PHSC 1001 : Patho Final
Document Summary
Light rays enter the eye through the cornea. Light rays pass through the lens to the receptor cells of the retina. Visual stimuli are conducted by the optic nerve to the occipital lobe. Information sent to other appropriate areas of the brain. Contain lysozyme antibacterial enzyme: muscles of the eyeball: Six extraocular muscles: muscles controlled by cn iii & iv. Anterior portion = cornea: middle layer uvea. Choroid dark vascular layer interior to the sclera. Rods dim light, night vision (black & white) Posterior cavity = space between lens & retina. Nerve fibers from the optic nerve (cn ii) Perception occurs in visual sensory & association areas of the occipital lobes of the cortex. Vibration of the tympanic membranes causes the ossicles to vibrate: motion of stapes against oval window initiates movement of the fluid in the cochlea. Impulses are conducted to the auditory area in the temporal love of the cerebral cortex for interpretation of sound.
