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Ocular A& P #8 Final
Terms- Covering Visual Fields and Nervous System
| Term | Definition |
|---|---|
| Lateral Geniculate Body | The processing center for visual information in the mid-brain and the visual processing center for V1. |
| Optic Track | The axons of the ganglion cells. It runs from chiasma to lateral geniculate. |
| Optic Radiations | In the temporal lobe and runs from the lateral geniculate body (LGB) to the occipital lobe. |
| Optic Nerve | The axons of the ganglion cells and runs from the globe to the chiasma. |
| Optic Chiasma | The axons of the ganglion cells, the fibers cross next to the Pituitary, and the visual field (VF) defect will be on both temporal areas. |
| Nerve Fiber Layer | The Axons of the ganglion cells and runs in an arcuate pattern |
| Efferent Fibers | Runs from the CNS to the organ (eye) |
| Afferent Fibers | Runs from the organ (eye) to the CNS |
| Pupillomotor Fibers | Separates the fibers in the optic nerve and leaves the optic track before the lat geniculate. |
| Meyers Loop | In the temporal lobe. |
| Ipsilateral | Same side |
| Contralateral | Opposite side |
| Congruous | VF defect is exactly the same for both VF and is an occipital lobe defect |
| Incongruous | VF defects is not exactly the same OU (both eyes) VF and is located in the temporal lobe. |
| Physiological Blind Spot | 15 degrees temporal to the central spot visual field. |
| Ceco-Central Scotoma | A central and paracentral VF defect and is an early VF defect in glaucoma. |
| Trigeminal Nerve | The sensory (V C.N.) to the eye, upper face, and tip of nose. |
| Facial Nerve | The motor nerve to the orbicularis. (VII C.N.) |
| Oculomotor Nerve | The nerve (III C.N.) to the medial, superior, and inferior rectus muscles and the levator palpebrae muscle. Efferent pupillomotor fibers are carried in the nerve. |
| Abducens Nerve | A slow light, accommodation, consensual reflex (VI C.N.) |
| Trochlear Nerve | The nerve to the superior oblique muscles (IV C.N.) |
| Sympathetic Innervation | The superior palpebral M. (Meuller) |
| Ophthalmic Nerve | Sensory to the the eye, upper face, and tip of nose. (V1) |
| Head Tilt Test | Called the Bielchowski, it tests for S.O palsy. |
| Parasympathetic N.S. | Efferent Pupillomotor fibers carried in the nerve |
| Pupillomotor Fibers | Afferent fibers that leave the optic track before the LGB. |
| Anisocoria | Difference in pupil size |
| Lagophthalmos | Inability to close lid |
| Neurotrophic Cornea | Loss of sensation to the cornea |
Created by:
Leequa
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