Jernej Rosker

• PhD
• Associate professor at University of Primorska

Pupillometry has been used in the studies of postural control to assess cognitive load during dual tasks, but its response to increased balance task intensity has not been investigated. Furthermore, it is unknown whether side‐specific changes in pupil diameter occur with more demanding balance tasks providing additional insights into postural contr...

Cervical-spine sensorimotor control is associated with chronicity and recurrence of neck pain (NP). Tests used to measure sensorimotor impairments lack consistency in studied parameters. Interpretation is often based on either a handful or numerous parameters, without considering their possible interrelation. Different aspects of motor-control coul...

Despite commonly investigated predictable smooth-pursuit neck-torsion tasks (SPNT) in neck pain patients, unpredictable conditions have been seldom investigated but are indicative of preserved oculomotor functions during neck torsion. Although not previously studied, some speculations about compensatory cognitive mechanisms such as increased phasic...

The sensory mismatch commonly observed in patients with neck pain disorders could alter intra-trial reliability in simple implicit smooth pursuit eye movement tasks. This could be more pronounced when neck is in torsioned position (SPNT). The aim of this study was to explore the effects of neck torsion, target movement velocity and amplitude on int...

Visual attention has a significant impact on shooting performance in basketball. Over the past 35 years, researchers have explored individual concepts of visual attention, such as gaze fixation, the number and direction of saccades, and their effects on shooting accuracy. The last gaze fixation, also known as the quiet eye, was found to be particul...

Taekwondo fighters require sufficient postural stability to maintain tactical superiority over an opponent. Postural balance is controlled by somatosensory, visual and vestibular system. Cervical spine has neurophysiological connection to the visual and vestibular system as well as abundance of receptors within the connective tissues of the spine....

Analyzing visual search strategies in tennis is primarily focused on studying relationships between visual behavior and tennis performance. However, diverse movement characteristics among different servers suggest the importance of adjusting the visual search strategies of an individual while playing against different opponents. The aim of this stu...

Interceptive tasks, such as returning a tennis serve, require efficient use of visual information. The aim of this study was to investigate whether there are differences in the gaze behaviour in two different groups of tennis players. Additionally, analysis between tennis serve returns of different quality have been conducted. Six-hundred and seven...

The ability to efficiently control balance is important for maintaining an independent life and performing daily activities. It also contributes to efficient walking and reducing the risk of falls. Maintaining balance is achieved by activity of interconnected systems: muscular, sensory, skeletal and central controlling mechanisms. The complexity of...

Tennis serve return performance has been related to the ability to anticipate ball flight direction early in the serve. The aim of this study was to assess whether there are differences in the focal vision fixations to different areas of the opponent in relation to return performance and if there are relevant correlations between visual fixations t...

Background Research indicates that neck kinaesthetic awareness plays an important role in oculomotor and balance control, however the relationship has not been studied in athletes. As performance in ice hockey demands visual perception acuity during skating, while constantly shifting between unilateral and bilateral stances in sports specific postu...

Background: Research indicates that neck kinaesthetic awareness plays an important role in oculomotor and balance control, however the relationship has not been studied in athletes. As performance in ice hockey demands visual perception acuity during skating, while constantly shifting between unilateral and bilateral stances in sports specific post...

31 The horizontal acceleration and agility are both an essential part of sports performance in handball. The foot placement variability has been shown to vary between differences in speed and direction of running. However, no studies have considered the connection between the foot placement variability, forward acceleration and agility performance....

The new doctoral study Prevention for Health is a modern and innovative study programme in which we aim to develop holistic preventive approaches to the most important public health problems in today's society in Slovenia and around the world. The study combines the fields of kinesiology, nursing, dietetics and physiotherapy in accordance with scie...

Reports on body sway control following microdisectomy lack reports on side specific balance deficits as well as effects of trunk balance control deficits on body sway during upright stances. Three weeks post microdisectomy, body sway of twenty-seven patients and twenty-five controls was measured while standing in an upright quiet stance with feet p...

The horizontal acceleration and agility are both an essential part of sports performance in handball. The foot placement variability has been shown to vary between differences in speed and direction of running. However, no studies have considered the connection between the foot placement variability, forward acceleration and agility performance. In...

Goal of this study was to present a new alpine skiing specific dynamic balance test and assess its reliability and sensitivity. Twelve trained and twenty-two non-trained skiers participated in the study. Both groups performed a dynamic lateral weight shift task in a semi-squat position, pursuing a predefined trajectory with their centre of pressure...

Bed rest has been shown to have detrimental effects on structural and functional characteristics of the trunk muscles, possibly affecting trunk and spinal stability. This is especially important in populations such as aging adults with often altered trunk stabilizing functions. This study examined the effects of a fourteen-day bed rest on anticipat...

Different balance tests are used to assess age-related decline of movement function. Good basic metric characteristics are in order for a balance test to become a useful assessment tool for clinical and research practice. By measuring balance of 27 young (22.3 ± 3.6 years) and 23 elderly (82.3 ± 9.6 years) adults discrimination power (ROC curve) of...

The purpose of this study was to use a holistic approach to investigate changes in jumping performance, kinaesthesia, static balance, isometric strength and fast stepping on spot during a 5-day recovery period, following an acute bout of damaging exercise consisted of drop jumps and leg curls, where specific emphasis was given on the hamstring musc...

Different dynamic balance tests help to identify specific balance deficits in elderly and various population groups. In addition, dynamic balance tests have proved useful in identifying potential locomotor-system injury risk factors. These tests differ in the quality of their metric characteristics which could influence their applicability to measu...

Literature confirms the effects of vision and stance on body sway and indicates possible interactions between the two. However, no attempts have been made to systematically compare the effect of vision on the different types of stance which are frequently used in clinical and research practice. The biomechanical changes that occur after changing sh...

Problem: Isolated strength measurements of knee extensors and flexors are important for identifying potential risks of injury and functional movement deficits in elderly. Various methods, measuring dynamic or isometric torque, have been used in rehabilitation and sports practice. Commonly used isokinetic and hand-held-dynamometry strength measureme...

Kinaesthesia and Methods for its Assessment: Literature Review In this review measurement techniques used for kinaesthetic sense assessment are presented. Kinaesthesia is an important part of human movement control and provides us with better understanding of specific movement system adaptations to fatigue, training and injury. Additionally, decrea...

The centre of pressure (COP) movement during stance maintenance on a stable surface is commonly used to describe and evaluate static balance. The aim of our study was to test sensitivity of individual COP parameters to different stance positions which were used to address size specific changes in the support surface. Twenty-nine subjects participat...

For the precise evaluation of body balance, static type of tests performed on a force plate are the most commonly used ones. In these tests, body sway characteristics are analyzed based on the model of inverted pendulum and looking at the center of pressure (COP) movement in time. Human body engages different strategies to compensate for balance pe...

For the precise evaluation of body balance, static type of tests performed on a force plate are the most commonly used ones. In these tests, body sway characteristics are analyzed based on the model of inverted pendulum and looking at the center of pressure (COP) movement in time. Human body engages different strategies to compensate for balance pe...

The aim of our study was to test sensitivity and repeatability of torque and angle active tracking tasks at the knee joint and to compare the results of these two tests with one another. Twenty-four healthy young volunteers participated in the study (age 23.2 ± 2.16 years). Each subject performed two active tracking tasks: knee torque tracking task...

Selection of body sway parameters according to their sensitivity and repeatability For the precise evaluation of body balance, static type of tests performed on a force plate are the most commonly used ones. In these tests, body sway characteristics are analyzed based on the model of inverted pendulum and looking at the center of pressure (COP) mov...

In this review measurement techniques used for kinaesthetic sense assessment are presented. Kinaesthesia is an important part of human movement control and provides us with better understanding of specific movement system adaptations to fatigue, training and injury. Additionally, decreased kinaesthesia can be an injury predisposing factor, which st...

Izvleček Metode aktivnega sledenja se uporabljajo tako pri vadbi kot postopkih vrednotenja z namenom izboljšanja ter analize funkcije senzorično-motoričnega sistema. Kljub širokemu področju uporabe, je le malo študij preverjalo njihovo ponovljivost. V predstavljeni študiji smo preverili znotraj-ter med-obiskovno ponovljivost ter občutljivost najpog...