Ravi Kant NarayanAll India Institute of Medical Sciences Bhubaneswar · Department of Anatomy
Ravi Kant Narayan
MD
About
139
Publications
64,710
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Introduction
Current research interests: Cephalometrics, Morphological anomalies, Morphological variations, Human Genome editing
Additional affiliations
May 2023 - January 2024
ESIC Medical College & Hospital Bihta
Position
- Professor (Assistant)
November 2021 - May 2023
Dr. B. C. Roy Multispeciality Medical Research Centre
Position
- Professor (Assistant)
September 2021 - November 2021
Andaman and Nicobar Islands Institute of Medical Sciences
Position
- Professor (Assistant)
Education
May 2015 - May 2018
August 2007 - September 2013
Publications
Publications (139)
Background Radiology is among India's top five speciality choices pursued by meritorious medical graduates. With the advent of the subspecialization degree courses, fellowships, the requirement of senior residency as faculty eligibility criteria, and the lucrative option of private practice, the final-year postgraduates are given opportunities to c...
The foot arches in humans are the complex musculo-skeletal-ligamentous structure that helps in shock absorption because of the elasticity and provides stability while transmitting the muscle force for walking. Primarily we observed the prevalence of flatfoot among adolescents going to college. Thereafter we determined the correlation of flatfoot wi...
Objective: The present study was conducted to collect morphometric data on the lumbar vertebrae pedicles of the
adult population from the eastern parts of India and analyse the variations, if any, with other parts of the country
and the world.
Methods: The retrospective cross-sectional study where lumbar pedicle morphometric data was obtained vi...
Literature is highly inconsistent in describing the proximal attachment of the anterolateral ligament (ALL) and its relationship with the lateral collateral ligament (LCL) in human knees. This observational study aims to investigate that lacuna. The gross dissection was performed in the lower limbs (n = 83) from the donated adult-age (> 18 years) e...
Pancreatic cancer continues to be a deadly disease because of its delayed diagnosis and aggressive tumor biology. Oncogenes and risk factors are being reported to influence the signaling pathways involved in pancreatic embryogenesis leading to pancreatic cancer genesis. Although studies using rodent models have yielded insightful information, the s...
Introduction
The facial canal (FC) is an extensive bony canal that houses the facial nerve and occupies a central position in the petrous part of temporal bone. It is of utmost significance to otologists due to its dehiscence and relationship to the inner or middle ear components. The main objectives of current investigation are to detect variation...
The existence of a previously unrecognized subarachnoid lymphatic‐like membrane (SLYM) was reported in a recent study. SLYM is described as an intermediate leptomeningeal layer between the arachnoid and pia mater in mouse and human brains, which divides the subarachnoid space (SAS) into two functional compartments. Being a macroscopic structure, ha...
The genitofemoral nerve (GFN) presents with a variable course in nearly half of the population. This variation can be seen in its availability, course, and branching. Here, a notable case during a cadaveric dissection revealed an unusually high bifurcation of the GFN on the left side, contrasting with the typical bifurcation observed on the right....
Background: Short-term memory loss as a persistent
symptom reported in recovered COVID-19 patients. We
assessed post discharge persistence of this symptom in
hospitalised patients.
Methods: A total of 209 hospitalised patients of
COVID-19 followed up for two years post discharge.
Patients were verbally interviewed through a telephonic call
an...
: The exocrine part of the pancreas has a duct system called the pancreatic ductal system (PDS). Its mechanism of
development is complex, and any reorganization during early embryogenesis can give rise to anatomical variants. The aim
of this study is to collect, classify, and analyze published evidence on the importance of anatomical variants of...
A recent study reported the existence of a subarachnoid lymphatic-like membrane (SLYM)-an intermediate leptomeningeal layer between the arachnoid and pia mater in mice and human brains-dividing the subarachnoid space (SAS) into two functional compartments. Despite being a macroscopic structure, how it missed detection in previous studies is surpris...
Humans exhibited superior accuracy compared to the AI models, showcasing a stronger comprehension of the subject matter. All three AI models included in the study could not achieve the minimum percentage needed to pass an FRCR2A
examination. However, generative AI models showed significant agreement in their
answers whereas the residents exhibited...
Background
This study aimed to provide an up-to-date account of the frequency of “the absence of interthalamic adhesion (AITA) as a risk factor or association” in healthy subjects and neuropsychiatric patients. Owing to the increased interest in the contribution of ITA to neurological function in previous literature, a meta-analysis of its frequenc...
Background: The scarcity of qualified doctors in rural areas remains a critical challenge for the health sector in India Aim was to analyze the perception of medical students regarding upcoming compulsory rural posting for 1 year as a part of their rotatory internship Methods: A cross-sectional survey was conducted in a medical college of West Beng...
Background:
The auditory tube (AT), an osteocartilaginous channel, connects the nasopharynx to the middle ear cavity. At the nasopharyngeal opening of the AT, there are dense collections of submucosal glands. In a recent article, Valstar et al. proposed these nasopharyngeal tubal glands conglomerate as salivary glands, which starkly contrasts with...
BACKGROUND
Delta variant (B.1.617.2) was considered the most dangerous SARS-CoV-2 strain; however, in-depth studies on its impact on demographic and clinical characteristics of COVID-19 are scarce.
OBJECTIVE
We aimed to investigate the shift in demographic and clinical characteristics of the COVID-19 pandemic with the emergence of the SARS-CoV-2 d...
Background
The Delta variant (B.1.617.2) was considered the most dangerous SARS-CoV-2 strain; however, in-depth studies on its impact based on demographic and clinical characteristics of COVID-19 are scarce.
Objective
We aimed to investigate the shift in demographic and clinical characteristics of the COVID-19 pandemic with the emergence of the SA...
The retroperitoneal adrenals are situated in the epigastric region of the abdomen, on the upper pole of either kidney. The glands are golden-yellow in color. The right adrenal is triangular or pyramidal, and the left one is semi-circular or crescentic in shape. The blood supply rate per gram of tissue for the adrenal gland is one of the highest. Th...
Emerging evidence suggests a detrimental impact of COVID-19 illness on the continued hippocampal neurogenesis in adults. In contrast, the existing literature supports an enhancing effect of COVID-19 vaccination on adult hippocampal neurogenesis. Vaccines against respiratory infections, including influenza, have been shown to enhance hippocampal neu...
BACKGROUND
A newly emerged SARS-CoV-2 variant B.1.1.529 worried the health policy makers worldwide due to a large number of mutations in its genomic sequence, especially in the spike protein region. World Health Organization (WHO) designated it as a global variant of concern (VOC) and was named 'Omicron.' Following Omicron's emergence, a surge in n...
Background
Emergence of the new SARS-CoV-2 variant B.1.1.529 worried health policy makers worldwide due to a large number of mutations in its genomic sequence, especially in the spike protein region. The World Health Organization (WHO) designated this variant as a global variant of concern (VOC), which was named “Omicron.” Following Omicron’s emerg...
UNSTRUCTURED
India has witnessed a devastating second wave of COVID-19, which peaked during the last week of April and the second week of May, 2021. We aimed to understand whether the arrival of second wave was predictable and whether it was driven by the existing SARS-CoV-2 strains or any of the emerging variants. We analyzed the monthly distribut...
Background
Since the start of the COVID-19 pandemic, health policymakers globally have been attempting to predict an impending wave of COVID-19. India experienced a devastating second wave of COVID-19 in the late first week of May 2021. We retrospectively analyzed the viral genomic sequences and epidemiological data reflecting the emergence and spr...
Ha transcurrido más de un año y medio desde el inicio de la pandemia debida a la enfermedad por coronavirus 2019 (COVID-19), y el mundo se esfuerza por contenerla. Al ser causada por un virus hasta ahora desconocido, en el periodo inicial hubo una escasez extrema de conocimientos sobre los mecanismos de la enfermedad, lo que dificultó las medidas p...
The suprarenal arteries are arising from three sources: superior suprarenal artery, middle suprarenal artery, and inferior suprarenal artery. Variations in the arterial supply of the suprarenal glands in respect to origin and number are quite common and very frequently reported. The most common variation noted is in the inferior suprarenal artery f...
Background:
A newly emerged SARS-CoV-2 variant B.1.1.529 has worried health policymakers worldwide due to the presence of a large number of mutations in its genomic sequence, especially in the spike protein region. World Health Organization (WHO) has designated it as a global variant of concern (VOC) and has named as Omicron. A surge in new COVID-1...
Young age, female sex, absence of comorbidities, and prior infection or vaccination are known epidemiological barriers for contracting the new infection and/or increased disease severity. Demographic trends from the recent COVID‐19 waves, which are believed to be driven by newer SARS‐CoV‐2 variants, indicate that the aforementioned epidemiological...
Background: The dural fold between anterior and middle clinoid processes on mineralization leads to the formation of caroticoclinoid foramen. Different morphology of this foramen presents with different clinical features. The present study reports the frequency of caroticoclinoid foramen in the population of Bihar, while providing an account of ass...
More than one and a half years have elapsed since the commencement of the coronavirus disease 2019 (COVID-19) pandemic, and the world is struggling to contain it. Being caused by a previously unknown virus, in the initial period, there had been an extreme paucity of knowledge about the disease mechanisms, which hampered preventive and therapeutic m...
More than one and half years have elapsed since the commencement of the COVID-19 pandemic and the world is struggling to contain it. Being caused by a previously unknown virus, in the initial period, there had been an extreme paucity of knowledge about the disease mechanisms, which hampered preventive and therapeutic measures against COVID-19. In a...
The sternalis muscle (SM) is an anatomical variant that lies subcutaneously and is superficial to the pectoralis major muscle or sternum. The present meta-analysis was conducted to analyze the prevalence, anatomical features, and variance of the SM in different population. In total, 98 studies were included for this meta-analysis. Eighty-two studie...
Importance: Higher risks of contracting infection, developing severe illness and mortality are known facts in aged and male sex if exposed to the wild type SARS-CoV-2 strains (Wuhan and B.1 strains). Now, accumulating evidence suggests greater involvement of lower age and narrowing the age and sex based differences for the severity of symptoms in i...
Context. On naked eye examination adrenal myelolipoma (AML) tissue appears to be an ectopic adrenal or renal tissue, based on the similarity to their external texture. This necessitates a histo-pathological study for confirming the origin of the tissue. Objective. To establish the origin and histological features of the incidental AML tissue found...
Background
Becoming acquainted with the variants of the inferior phrenic artery is crucial for surgeries done for compression syndrome of the coeliac trunk. Awareness of the arterial variations of the suprarenal gland is important while performing surgical and radiological interventions of this gland and its surrounding structures.
Materials and m...
Raymond de Vieussens was an exemplary anatomist who made seminal contributions in the field of cardiology. During initial part of his academic career, he adopted human dissection based experiments as medium of his research. This was in accordance with prevailing trend among anatomists during 17th century. He discovered the presence of tiny venous t...
Purpose:
Vaccine breakthrough infections have been frequent during the second wave of COVID-19 in India. We made an assessment of the severity of illness in breakthrough cases of COVID-19 using an online survey conducted during the period of second wave.
Methods:
An online questionnaire was circulated among healthcare workers across multiple medica...
Recent epidemiological studies analyzing sex disaggregated patient data in COVID-19 across the world revealed a distinct sex bias in the disease morbidity as well as the mortality-both being higher for the men. Similar antecedents have been known for the previous viral infections, including from coronaviruses, such as severe acute respiratory syndr...
Background: The core elements of cardiovascular science have been established by scholarly pursuits of numerous scientists across centuries. In this article, we have tried to trace the evolutionary journey of cardiovascular science from a rudimentary form in ancient period to a robust scientific discipline in modern times.
Methods: A literature se...
India has witnessed a devastating second wave of COVID-19, which peaked during the last week of April and the second week of May, 2021. We aimed to understand whether the arrival of second wave was predictable and whether it was driven by the existing SARS-CoV-2 strains or any of the emerging variants. We analyzed the monthly distribution of the ge...
The rotator cuff is the prime stabilizer of the glenohumeral or shoulder joint. The last
decade saw introduction of three components, namely, rotator cable, rotator crescent, and rotator interval of rotator cuff, which were being studied and published in
dozen of literatures belonging to clinical specialties of orthopaedics and radiology. At
times...
Introduction
The proximal insertion beyond coracoid process of pectoralis minor is considered as hidden culprit of rotator cuff disorders. The ectopic insertion is also associated with thoracic outlet syndrome. The current review was conducted to provide a comprehensive evidence-based assessment of the anatomical characteristics of ectopic insertio...
Introduction: Orbital fractures are commonly reported following injury to maxillofacial region. Management of these fractures often poses a challenge due to potential involvement of a number of anatomical structures. Hence this study was attempted to collate the anatomical details relevant to clinical presentation of orbital fracture as available i...
For long the CNS had been considered to lack lymphatics. The last few years have been spotted with works conflicting the immune-privilege status of CNS. Experimental evidence has assured the presence of lymphatics in the meninges, the meningeal lymphatic vessels (mLVs), along the venous sinuses carrying the immune cells along with drainage of cereb...
Intense immunological dysregulation including immune cell lesions has been characteristically observed in severe cases of coronavirus disease-2019 (COVID-19), for which molecular mechanisms are not properly understood. A study of physiological expressions of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) host cell entry-related factor...
Introduction: The aim of present study was to undertake detailed analysis of variations in morphology of orbito-meningeal foramen (OMF), a clinically relevant entity due to possible association with major arterial branches.
Materials & Methods: The study was conducted on 70 bony orbits of 35 dry adult human skulls. Precise identification of OMF’s...
Objective:
Osteoarthritis (OA) and age-related degeneration (ARD) are stimulants for the development of the fabella in the knee joint. This meta-analysis updates previous studies and reviews on the prevalence of the fabella in OA or ARD knee joints. In addition, it provides a quantitative estimation of the fabellar prevalence in knees having OA an...
The pandemic of the coronavirus disease, 2019 (COVID-19) has caused millions to suffer from the disease and to die globally. Global epidemiological statistics reflect, significantly more numbers of men, aged, those suffering from co-morbidities, and people facing socio-economic inequalities, such as, racial/ethnic minorities, have been affected by...
Recently, an article by Valstar et al was published in Radiotherapy and Oncology journal, which claimed to discover a pair of macroscopic salivary glands located in the dorsolateral nasopharynx around the Eustachian Tube (ET), and termed as tubarial salivary glands [ 1 ]. Authors proposed that these tubarial glands present a potential new organ. Th...
Ongoing epidemic of Coronavirus disease (COVID-19) has
presented new challenges to the oncologists. Recent
studies have suggested higher COVID-19 related mortality
in cancer patients,[1] reasons for which are currently little understood. Although, COVID-19 primarily causes acute respiratory distress syndrome (ARDS), widespread inflammation and mult...
Lack of standardized therapeutic approaches is arguably the significant contributor to the high burden of mortality observed in the ongoing pandemic of the Coronavirus disease, 2019 (COVID-19). Evidence is accumulating on SARS-CoV-2 specific immune cell dysregulation and consequent tissue injury in COVID-19. Currently, no definite drugs or vaccines...
Paucity of knowledge about SARS-CoV-2 specific virulence factors has greatly hampered therapeutic management of patients with COVID-19. Recently, a cluster of studies appeared, which presented empirical evidence for SARS-CoV-2 specific virulence factors that can explain key elements of COVID-19 pathology. These studies unravel multiple structural a...
The ongoing coronavirus disease-2019 (COVID-19) pandemic has raised significant public health issues which need to be attended. To enable efficient handling of the situation and prevent the spread of the epidemic, healthcare professionals require various standard operating procedures (SOPs). Emerging evidence suggests high infectivity of the novel...
The article is presenting a bioinformatics based method predicting susceptibility for SARS‐CoV‐2 infection in domestic and wildlife animals. Recently, there were reports of cats and ferrets, dogs, minks, golden hamster, rhesus monkeys, tigers, and lions testing for SARS‐CoV‐2 RNA which indicated for the possible interspecies viral transmission. Our...
Introduction: Most popular approach for maxillary nerve block is via greater palatine canal (GPC) which is often difficult to access due to anatomical variations of its entry point the greater palatine foramen (GPF) thus resulting in failure of nerve block. It was hypothesized that exploring morphology of GPF with a modified approach may be useful...
Structure - function interdependence is a universal phenomenon in biological systems. Any alteration in structural features may result in change in functions–leading to natural selection of a particular trait, or dysfunctions thereof. Many such alterations arise during the course of evolution of a species and may meticulously be traced during embry...