11-04-2006, 02:43 PM
neoplasia> how would you explain C?
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anat - neoplasia
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11-04-2006, 03:22 PM
Neurological Control
Both sensory and motor information are necessary for the initiation of the swallow response; swallowing is dependent on both sensory and motor control or on information from both afferent and efferent systems. Sensory feedback plays a more important role in swallowing than it does in speech. Sensory input involved in the initiation in the swallow comes from the trigeminal, facial, and glossopharyngeal nerves. Information about motor movement is received from the muscle spindles in the tongue via the hypoglossal nerve. Sensory and motor information from these sources is carried to the swallowing center, which is believed to be located in the medulla, within the nuclei of the reticular formation; specifically the nucleus ambiguous. When the swallow response is initiated, this center causes messages to be sent to the glossopharyngeal, the vagus, and the hypoglossal nerves. The glossopharyngeal is considered the major nerve for the swallowing center. Six of the cranial nerves provide the innervation for both swallowing and speech: CN. V The Trigeminal Nerve CN. VII The Facial Nerve CN. IX The Glossopharygeal Nerve CN. X The Vagus Nerve CN. XI The Spinal Accessory Nerve CN. XII The Hypoglossal Nerve I hope this explanation can help for better understanding of above Qs.
11-04-2006, 03:22 PM
Neurological Control
Both sensory and motor information are necessary for the initiation of the swallow response; swallowing is dependent on both sensory and motor control or on information from both afferent and efferent systems. Sensory feedback plays a more important role in swallowing than it does in speech. Sensory input involved in the initiation in the swallow comes from the trigeminal, facial, and glossopharyngeal nerves. Information about motor movement is received from the muscle spindles in the tongue via the hypoglossal nerve. Sensory and motor information from these sources is carried to the swallowing center, which is believed to be located in the medulla, within the nuclei of the reticular formation; specifically the nucleus ambiguous. When the swallow response is initiated, this center causes messages to be sent to the glossopharyngeal, the vagus, and the hypoglossal nerves. The glossopharyngeal is considered the major nerve for the swallowing center. Six of the cranial nerves provide the innervation for both swallowing and speech: CN. V The Trigeminal Nerve CN. VII The Facial Nerve CN. IX The Glossopharygeal Nerve CN. X The Vagus Nerve CN. XI The Spinal Accessory Nerve CN. XII The Hypoglossal Nerve I hope this explanation can help for better understanding of above Qs.
11-04-2006, 03:30 PM
yelito61 -- ur explination is great - but how does that explain why the answer is C?
Neoplasia - are u sure the answer is C (CN XI - The spinal acessory Nerve??????????
11-04-2006, 03:30 PM
yelito61 -- ur explination is great - but how does that explain why the answer is C?
Neoplasia - are u sure the answer is C (CN XI - The spinal acessory Nerve??????????
11-04-2006, 04:20 PM
I think that the correct answer should be b: Glossopharyngeal nerve.( 1X)
11-04-2006, 04:20 PM
I think that the correct answer should be b: Glossopharyngeal nerve.( 1X)
11-05-2006, 02:58 PM
Dear neoplasia:
your question is vague: which nerve controls the swallowing movements: A 1Oth B 9th C 11th d 12th Both A and B could be answers, although CN XII is part of the voluntary stage of swallowing the second stage of swallowing commences with sensory stimulation of mucosa innervated by CN IX which activates all of the skeletal muscles innervated by CN X that elevate the palate, initiate peristalsis in the pahrynx and close the larynx. CN XI is not a player- your answer probably refers to the cranial part of CN XI which is really the vagus nerve,
11-05-2006, 02:58 PM
Dear neoplasia:
your question is vague: which nerve controls the swallowing movements: A 1Oth B 9th C 11th d 12th Both A and B could be answers, although CN XII is part of the voluntary stage of swallowing the second stage of swallowing commences with sensory stimulation of mucosa innervated by CN IX which activates all of the skeletal muscles innervated by CN X that elevate the palate, initiate peristalsis in the pahrynx and close the larynx. CN XI is not a player- your answer probably refers to the cranial part of CN XI which is really the vagus nerve, |
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