Sensory Physiology 4

• 1. Neurons are specialized to respong best to specific aspects of stimuli, such as orientation, movement and size.
• 2. These specializations can be demonstrated physiologically, by recording from neurons

• - Spots of light stimulate ganglion cells
• - Spots of light do little to stimulate neurons in V1
• -Sliding a slit of light across the visual field caused neurons to discharge
• - They found that V1 neurons respond best to bar-like stimuli with specific orientations

Cortical neurons fire in response to specific features of the stimulus, such as orientation or direction of motion

• Where or how pathway
• Parietal cortex
• Spatial analysis
• Motion
• Visual control of movement

• What pathway
• Temporal Cortex
• Object and Pattern Identification

Dorsal and ventral streams