Chapter contents
Overview
Sensory transduction
Central course
Primary visual cortex
Retinal deficits
Optic nerve damage
Chiasm damage
Damage posterior to chiasm
| Cranial Nerve II - Optic Nerve | Page 10 of 11 |
Clinical correlation - damage posterior to the optic chiasm
Because half of the ganglion cell axons projecting to the lateral geniculate nucleus decussate in the optic chiasm, damage posterior to the chiasm results in loss of input from the contralateral visual fields of both eyes.
Figure 2-10a. Damage posterior to the optic chiasm.
Damage to the optic tract
Results in loss of the contralateral visual fields in both eyes (homonymous hemianopia).
Figure 2-10b. Damage to the optic tract.
