PSY 434 Chapter Notes - Chapter 13: Homonymous Hemianopsia, Optic Chiasm, Optic Nerve
Document Summary
Rods sensitive to dim light, are used mainly for night vision. Cones transducer bright light and are used for daytime vision. There are 3 types: photorecepter ; there are 2 types. 2. bipolar cells use action pot. in ganglion cells: ganglion cells sends axons into the brain proper. Stimulus in the visual system is light (electromagnetic energy) From the eye to the cns pg 206-208. Axons of the ganglion cells form a bundle = the optic nerve. Visual information is transmitted to the cns via optic nerve. Optic nerve splits into two parts before entering brain. Once inside the brain, each optic nerve divides into pathways that differ with respect to where they terminate. Each eye is divided into two identical halves. Within each eye, one half receives stimulation from the left visual field and the other from the right visual field. Lateral or temporal branch stays on the same side.
