Term

Pathway from Retina to Cortex

Definition

Retina → Lateral geniculate nucleus (LGN) → V1 V1: primary visual cortex (occipital lobe), also called striate cortex From V1: pathways to temporal and parietal lobe → frontal lobe Here, we focus on processing in (pathway from retina to) V1. not directly from eye to cortex early on process is based on visual field

Term

Lateral geniculate nucleus processing

Definition

LGN cells have center-surround receptive fields. stimulating at sensitive area of the cells, decreases further away Major function of LGN is to regulate neural signals from retina to visual cortex. Signals are received from retina, cortex, brain stem, and thalamus. Signals are organized by eye, receptor type, and type of environmental information

Term

Maps: Representing Spatial Layout

Definition

Retinotopic map - each place on retina corresponds to a place on LGN Determining retinotopic maps - record from neurons with an electrode that penetrates the LGN obliquely Stimulating receptive fields on retina shows location of corresponding neuron in LGN gradual shift in position in LGN