Article
The role of the cerebral cortex in swallowing.
Faculty of Dentistry, University of Toronto, Ontario, Canada.
Dysphagia (impact factor:
1.39).
02/1993;
8(3):195-202.
DOI:10.1007/BF01354538
pp.195-202
Source: PubMed
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Citations (0)
- Cited In (4)
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Article: Neuroplasticity of face primary motor cortex control of orofacial movements.
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ABSTRACT: We have carried out a series of studies to address the role of the face primary motor area (MI) in the cerebral cortex in trained or semi-automatic orofacial motor behaviours and in behavioural adaptations to an altered oral environment. These studies have utilized intracortical microstimulation (ICMS), reversible cold block or single neurone recordings in face MI. Our studies in monkeys have revealed that face MI plays a strategic role in elemental and learned motor behaviours and in certain aspects of chewing and swallowing. Furthermore, successful training of awake monkeys in a novel tongue-protrusion task is associated with significant neuroplastic changes in face MI. These findings in monkeys are supported by correlated findings in humans which have revealed significantly enhanced corticomotoneuronal excitability when humans learn the novel tongue-protrusion task. Our related ICMS studies in rats reveal that trimming or extraction of the rat's lower incisors or damage to the rat's lingual nerve can result in significant changes in the MI representations of the tongue or jaw muscles. These various findings suggest that the face MI is important in orofacial motor skill acquisition and adaptation to an altered occlusion or loss of teeth or lingual sensory function, and that it reflects dynamic and modifiable constructs that are modelled by behaviourally significant experiences and that are critical to learning and adaptive processes.Archives of Oral Biology 05/2007; 52(4):334-7. · 1.60 Impact Factor -
Article: Cortical activation during solid bolus swallowing.
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ABSTRACT: Specific areas of cortical activity during solid bolus swallowing in humans are unknown. We tested the hypothesis that cortical representations of swallowing in humans may vary by bolus type. Twenty-one normal subjects swallowed three kinds of food: agar (solid), a capsule and water. We followed the same countdown method for identification of the cortical representations during swallowing performances as a previous study (Tanaka et al., 2006). Functional magnetic resonance imaging (fMRI) showed that the precentral gyrus, postcentral gyrus, medial temporal gyrus, superior temporal gyrus and cingulate gyrus were activated when swallowing an agar bolus (p<0.001). The subcortex was not activated. The cerebellum was activated only during capsule swallowing (P<0.001). Water bolus swallowing activations were similar to agar bolus swallowing. The cluster size of water swallowing was larger than the agar swallowing. We conclude that the cortical representations for swallowing are variable by food type.Journal of medical and dental sciences 03/2007; 54(1):25-30. -
Article: Sensory input pathways and mechanisms in swallowing: a review.
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ABSTRACT: Over the past 20 years, research on the physiology of swallowing has confirmed that the oropharyngeal swallowing process can be modulated, both volitionally and in response to different sensory stimuli. In this review we identify what is known regarding the sensory pathways and mechanisms that are now thought to influence swallowing motor control and evoke its response. By synthesizing the current state of research evidence and knowledge, we identify continuing gaps in our knowledge of these mechanisms and pose questions for future research.Dysphagia 12/2010; 25(4):323-33. · 1.39 Impact Factor
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Keywords
cerebral cortex
cortex
Cortical dysfunction
cortical structures
mastication
neuroanatomical
Neuroanatomical investigations
neurophysiological studies
paper reviews clinical
pathways
single neuron recording studies
swallowing impairments