CRANIAL NERVE XII: HYPOGLOSSAL NERVE
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1.12.06
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You are here: Home » Anatomy Notes » CRANIAL NERVE XII: HYPOGLOSSAL NERVE
PATH:
- It exits the posterior cranial fossa through the Hypoglossal Canal, which is anterior to the Occipital Condyles.
- It may pass through the Carotid Sheath or on either side of it.
- It passes toward the tongue medial to the posterior belly of the Digastric muscle.
- Upper portions of the Ansa Cervicales will hang off the Hypoglossal in order to reach the strap muscles, but the fibers do not intermix.
DAMAGE TO HYPOGLOSSAL:
- It would be difficult to stick tongue out.
- The tongue would deviate toward the nonfunctional side, due to functional muscles protruding it in that direction.
- If tongue deviates to the left, then damage is to the left hypoglossal nerve.
Tags: nerve, tongu, hypoglossal, cranial, anatomy
Category: Anatomy Notes
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4 comments:
would damage to this nerve ie by piercing cause damage to other areas ie could it affect joint movemnet in the hips and restricted walking?
Damage to this nerve will not affect any other part of the body except the neck and oral muscles.
Could surgical removal of the parathyroid gland cause damage to this nerve and subsequently effect one's ability to move the tongue (it gets fatigued during chewing, talking) and to swallow? Are pain, numbness and fatigue symptoms of hypoglossal nerve damage?
It is unlikely that there will be any damage to this nerve while removing the parathyroid glands. However damage to this nerve might cause difficulty while chewing and to some extent swallowing.
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