Facial colliculus
Encyclopedia
The facial colliculus is an elevated area located on the dorsal pons. In the floor of the 4th ventricle It is formed by motor fibers of the facial nerve
as they loop over the abducens nucleus
. Thus a lesion to the facial colliculus would result in facial muscle paralysis
.
Facial nerve
The facial nerve is the seventh of twelve paired cranial nerves. It emerges from the brainstem between the pons and the medulla, and controls the muscles of facial expression, and functions in the conveyance of taste sensations from the anterior two-thirds of the tongue and oral cavity...
as they loop over the abducens nucleus
Abducens nucleus
The abducens nucleus is the originating nucleus from which the abducens nerve emerges - a cranial nerve nucleus. This nucleus is located beneath the fourth ventricle in the caudal portion of the pons, medial to the sulcus limitans....
. Thus a lesion to the facial colliculus would result in facial muscle paralysis
Paralysis
Paralysis is loss of muscle function for one or more muscles. Paralysis can be accompanied by a loss of feeling in the affected area if there is sensory damage as well as motor. A study conducted by the Christopher & Dana Reeve Foundation, suggests that about 1 in 50 people have been diagnosed...
.
External links
- http://www.med.yale.edu/caim/cnerves/cn6/cn6_2.html
- http://www.neuroanatomy.wisc.edu/virtualbrain/BrainStem/14CNVII.html
- http://www.ib.amwaw.edu.pl/anatomy/atlas/image_04be.htm