Term
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Definition
| intorts the eye ,- brings it in and depresses it . |
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Term
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Definition
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Term
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Definition
| rapid ballistic , used udring readign or movign teh gaze , volutnaryand reflexive |
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Term
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Definition
| slwo trackgn movemetns made voluntaryily and requiing atarget |
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Term
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Definition
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Term
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Definition
| conjugate right gaze, left gaze, convergance, divveragance |
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Term
| lateral rectus innervation |
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Definition
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Term
| medial rectus innervation |
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Definition
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Term
| superior rectus innervation |
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Definition
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Term
| inferior rectus innervation |
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Definition
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Term
| inferior oblique innervation |
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Definition
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Term
| superior oblique innervation |
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Definition
| tochlearne rve (like a pulley) |
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Term
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Definition
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Term
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Definition
| medial deviation of the eye |
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Term
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Definition
| oen eye is hgiher htan the other |
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Term
| levator palpebrae superiois |
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Definition
| innervated by the occulomotor nerve , keeps eyelids from drooping |
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Term
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Definition
| ending of the levator palabari superiorus, innervated by sympathetics. responsible for keeping eyelid open |
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Term
| occulomotor nerve innervation types |
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Definition
GSE- goes to extraoccualr muscles and levator plabrae
GVE- edegar westefeld nucleus, to the pupillary constrictor and ciliary msucle of hte lens (pregnagoinic parasymptehtic |
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Term
| occulomtoor nerve lesion e ffect |
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Definition
| exotropia- down and out, diplopia double vision, mydriasis, ptosis, lack of ccomodation (lens wont chagne shape), all ipsilateral |
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Term
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Definition
| is conencted so suspensory ligaments. WHen ciliary msucle is relaxed, ahve tension on suspensory ligament and tehe lense is puleld flat. when cilliayr msuclei s contracted, suspensory lgiaments are relaxed, rsulting in roudner, thicker lense for viewing close objects |
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Term
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Definition
| comorpsses ocullotmor , can e from superior cerebellar artery ,psoteriowr cerebral artery, itnernal carotid and psoterior communciating artery |
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Term
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Definition
| supratentorial mass , causing uncus to herniate through tentoriial cerebellum |
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Term
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Definition
| on midbrain- coma , carnial nerve three (blown pupil), and contralateral hemiplegia - due to cerebral peduncles. |
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Term
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Definition
hypertropia and extorsion- head tilt and chin tuck away from the affected eye wil lcorrect the problem.
cn nerve iv - ispilateral sysmtpoms
cn nucleus iv- contralteral |
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Term
| abducens nulceus functiosn and palsy |
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Definition
| innervate teh lateral rectus muscle. Any deficit will result in esotropia |
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Term
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Definition
| pathway connecting vestibular nuclei to CN III, iv and VI. Originates in vestibualr nuclei ,and contains tectospinal fibers |
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Term
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Definition
| start with vestibular input goign into vestibular nucei via semiciruclar cnal. projeciton to contralateral VI, causing the contralateral eye to abduct , this abducens nucleus utilized the mlf pathway to excit eth ocoulmotor nucleus and crosses over here, causing excitation of the occulomotor nuclues ipsilateral to the firred veistbular nulceus. This results in the eye moving medially. |
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Term
| oculocephalic reflex : dolls eye |
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Definition
| check for this in patient with coma .VOR shoudl still fucniton, if it doesnt work, means that there is problem in the VOR pa thway. |
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Term
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Definition
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Term
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Definition
| when being spun- endolymph movesi n direciton of s pin, so VOr goes to oppostie sdie which means the saccade goes to tehsame side. WHen we s top, the endolymph starts moving to the oposite side but stays there , whih leads to nsytagmus to the same side s rotation |
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Term
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Definition
| used if suspect tumor or interuption to vestibulocohcelar reflex, as enabls seperate testing of each system. can be usedi n coma- however the quick saccade onlyo ccurs in conscious patients |
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Term
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Definition
| occulomtoor cant respond so the medially moving eye to VOR cant operate. |
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Term
| braisntem lesion effect on vor |
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Definition
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Term
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Definition
| sensation of turningn or rotating in space in absence of rotaton |
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Term
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Definition
| debris from otolithic membrane in ampulla , lesions in cn VIII , or vestibular nuclei, infection of vestibular labrynth ,meniers disease ,brainstem/cerebelalr lesions |
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Term
| Paramaedian pontine reticular formaiton |
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Definition
| goes up to adjacent nuclei baducens nuclei and goges to lateral rectus from there. THen fromteh abducens goes via mlf to the cotnralater oculomotorn ulceus |
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Term
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Definition
| rostral interstitial nucleus |
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Term
| oblique eye movements nucleus |
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Definition
| ombinatino of pprf and Rostral itnerstitial nuclus |
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Term
| horizontal saccades pathway |
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Definition
| starts in the frontal eye fields and projects down to the contralateral PPRF adn the ispilateral sueprior colliculus. WHen FEF is damged we get inability to make saccades to the opposite side, and eye drifting to the same side of the lesion. Permanent inability to make voluntary eye mogv ements not triggered by stimulus. |
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Term
| look at lesions to eye nerves (slide 34 in eye mvoemetns lecture) |
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Definition
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Term
| are of cortex contorlling smooth pursuit movements |
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Definition
| ipsilateral parietooccipitaltemproal area dn the visual cortex |
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