Search results
Results From The WOW.Com Content Network
Neurogenic ptosis, which includes oculomotor nerve palsy, Horner's syndrome, Marcus Gunn jaw winking syndrome and third cranial nerve misdirection. Myogenic ptosis, which includes oculopharyngeal muscular dystrophy, myasthenia gravis, myotonic dystrophy, ocular myopathy, simple congenital ptosis and blepharophimosis syndrome.
It is important to distinguish the ptosis caused by Horner's syndrome from the ptosis caused by a lesion to the oculomotor nerve. In the former, the ptosis occurs with a constricted pupil (due to a loss of sympathetics to the eye), whereas in the latter, the ptosis occurs with a dilated pupil (due to a loss of innervation to the sphincter ...
Oculomotor nerve palsy or oculomotor neuropathy [1] is an eye condition resulting from damage to the third cranial nerve or a branch thereof. As the name suggests, the oculomotor nerve supplies the majority of the muscles controlling eye movements (four of the six extraocular muscles, excluding only the lateral rectus and superior oblique).
[4] [5] Lesions in CN III can cause ptosis, [5] because without stimulation from the oculomotor nerve the levator palpebrae cannot oppose the force of gravity, and the eyelid droops. Ptosis can also result from damage to the adjoining superior tarsal muscle or its sympathetic innervation.
The examination shows ptosis of the left eyelid, exotropia (outward deviation) of the primary gaze of the left eye, and paresis (weakness) of the left third, fourth and sixth cranial nerves. Specialty: Neurology
The examination shows ptosis of the left eyelid, exotropia (outward deviation) of the primary look of the left eye, and paresis (weakness) of the third (oculomotor), fourth (trochlear) and sixth (abducens) left cranial nerves.
Ptosis (drooping eyelid) is when the upper eyelid droops or sags due to weakness or paralysis of the levator muscle (responsible for raising the eyelid), or due to damage to nerves controlling the muscle. It can be a manifestation of the normal aging process, a congenital condition, or due to an injury or disease.
There are also several abnormal cranial nerve synkineses, both acquired and congenital. Marcus Gunn jaw-winking is an example of a pathologic congenital synkinesis. First described by the ophthalmologist Marcus Gunn in 1883, [3] this condition presents in approximately 5% of neonates with congenital ptosis.