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Ocular A&P #9 Final
Questions (MANY IMAGES IN TARGET!!) for Visual Field and Nervous System
| Question | Answer |
|---|---|
| What VF defect runs in an arcuate pattern and has the VF defect in the same half of both VF (EX: Nasal OD, Temporal OS)? | Homonymous VF Defect |
| What VF defect happens when there is a lesion at the chiasma? | Bitemporal VF Defect |
| What VF defect occurs when you have a lesion at the chiasma and the optic nerve? | Junctional VF Defect |
| What VF defect is an early VF defect in glaucoma? | Nasal Step VF Defect |
| What VF defect runs in an arcuate pattern, is typical glaucoma defect, and causes a Bjerrum scotoma? | Arcuate VF Defect |
| What VF defect is an optic nerve defect and a macular defect? | Central VF Defect |
| A lesion in the ______________ causes a VF defect in exactly the same for both VF and the VF defect is in the same half of both VF (EX: Nasal OD, Temporal OS). | Occipital Lobe |
| Macular sparing occurs if there is a lesion is located in the _______________. | Occipital Lobe |
| What is macular sparing? | Retention of macular function in spite of losses in the adjacent visual field as, for example, in homonymous hemianopia due to a cortical lesion (e.g. an interference in the blood flow in the middle cerebral artery). |
| What VF defect happens when there is an occipital lobe defect? | Central (Macula) VF Sparing |
| What nerve is involved in a blow out fracture? | The infraorbital nerve. |
| What is the normal amount of anisocoria? | 1mm |
| The Oculomotor nerve carries which type of autonomic N.S. fibers? | The parasympathetic to the iris. |
| Which part of the cornea has no sensory nerves? | The deep layers. |
| What main nerves go through the superior orbital fissure? | III, IV, VI, and V1 |
| What goes through the inferior orbital fissure? | V2 Maxillary |
| What goes through the optic canal? | The optic nerve and the ophthalmic artery. |
| What nerve supplies the tip of the nose? | Ophthalmic V1 |
| Where are the afferent pupillomotor fibers located? | Accompany the optic nerve and track and leaves prior to the lateral geniculate. |
| Where are the efferent pupillomotor fibers located? | Runs within the III C.N., through the ciliary ganglion, and into the iris and ciliary body. |
| Name the 3 branches of the Trigeminal nerve. | Ophthalmic, Maxillary, Mandibular |
| Disruption of the pupillomotor fibers will affect which two light reflexes? | Direct and Consensual |
| What nerves run through the ciliary ganglion? | Sensory, Parasympathetic, and the Sympathetic |
| Alpha and Beta receptors are part of the _______________ N.S. | Sympathetic |
| The neurotransmitter for the sympathetic n.s is ___________ and for the parasympathetic n.s is ___________. | Nor-epinephrine (epinephrine), acetyl choline |
| Slow pulse, sweating, pupillary constriction is from ____________ | Parasympathetic |
| Lytic means _______________. | Antagonist |
| Mimetic means ___________________. | Stimulate and Agonist |
| The action of sympathomimetic is about the same as the action of a ______________. | parasympatholytic. |
| Paresis means ______________. | Partial loss |
| Stimulation of the Abducens nerve would cause the eye to ______________. | Abduct |
| Stimulation of the Trochlear nerve would cause the eye to ____________. | Go down when looking towards the nose. |
Created by:
Leequa
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