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13 Cards in this Set
- Front
- Back
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What is the function of the inferior olive? |
To compare the actual to the intended motor movements and aid in corrections |
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Where is the nucleus ambiguus located? |
In the lateral medulla at the level of the inferior olive |
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A unilateral lesion in the nucleus ambiguus may result in? (3) |
Nasal speech (palatine weakness), hoarse voice (laryngeal paralysis), and deviation of the uvula to the normal side |
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A bilateral lesion in the nucleus ambiguus may result in? (4) |
Severe dysfunction - dysphagia, hoarseness, difficulty breathing (laryngeal muscle paralysis) |
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SVA fibers from which cranial nerves enter the rostral aspect of nucleus solitarius? |
CN VII, IX, and X; carrying information about taste sensation from the tongue, epiglottis, and pharynx |
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What part of the medulla is supplied by the anterior spinal artery? |
The medial portion of the medulla, as well as the ventral spinal cord |
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The posterior inferior cerebellar artery supplies what? |
Lateral medulla and inferior cerebellum |
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Dysfunction of cranial nerve IX may result in? (4) |
Poor gag reflex, carotid baroreceptor hypersensitivity response, reduced taste, and rarely glossopharyngeal neuralgia |
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Where does the vagus nerve exit the skull? |
Through the jugular foramen, along with cranial nerves IX and XI |
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A lower motor neuron lesion of CN XI will result in? |
Ipsilateral shoulder droop and head tilt on the side opposite the lesion (weak ipsilateral sternocleidomastoid muscle) |
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An upper motor neuron lesion of cranial nerve XII may result in? |
Tongue deviating toward the side opposite the lesion. In a lower motor neuron lesion of CN XII, the tongue deviates toward the side of the lesion, and associated atrophy and fasciculations may be present |
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Which nerves and structures are involved in the baroreceptor reflex? |
Cranial nerves IX and X as well as nucleus ambiguus and nucleus solitarius |
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Afferent and efferent limbs of the gag reflex? |
Afferent - CN IX (GVA); efferent - CN X (SVE - nucleus ambiguus) |
