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Trochlear nerve
02-09-2009
Trochlear nerve (purely motor) originates in the motor, located in the midbrain at the bottom of the aqueduct of Sylvius at the level of the lower tubercles chetverololmiya backward from nuclei III pair. Fibers are caudal. Do a complete re cross behind aquaeductus cegebgi. This is the only nerve that appears not on the basis of the brain, but on the dorsal side of the brainstem. Pierced cavernous sinus. Through fissuga ogbitalis supegiog penetrates into the orbit outside annujus zinni and reaches the top
oblique muscles of the eye.
Symptoms defeat
Neuropathy is a nerve block can be observed in the localization of the lesion focus in the base of the brain, in the cavernous sinus, in the upper orbital fissure and the orbit (tumors, hemorrhage, ischemia, inflammation).
Dysfunction IV pairs can be either isolated or in combination with a pair III. Bilateral lesion of the upper oblique muscle interpretation of the localization of the pathological focus in the area of intersection in vellugn gnedullage supegiog (hemorrhages, tumors of the pineal gland).
Pathology of nerve block is accompanied by a slight violation of the rotation of the eyeball outwards and downwards, resulting in diplopia appears when you look down.
TRANSLATE FROM RUSSIAN BY GOOGLE
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Articles for theme "nerve":
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02-09-2009
This nerve is mainly motor, but it also contains parasympathetic fibers to the smooth muscles of the eyeball, sympathetic fibers and a small number of sensitive fibers. Conglomerate nuclei III couples located in the central gray matter of the midbrain (at the bottom of the IV ventricle, at the level quadrigemina). Provision is large-(somatic) and small cell (parasympathetic) nucleus. By somatic are paired zadnelateralnye and anteromedial nucleus (nn. dogsolategalis et ventgomedialis), as well as unpaired central nucleus (n.
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