Mechanisms of Perception: Hearing, Touch, Smell, Taste and Attention - From Retina to Primary Visual Cortex - Dermatomes
3 important questions on Mechanisms of Perception: Hearing, Touch, Smell, Taste and Attention - From Retina to Primary Visual Cortex - Dermatomes
Which two channels of communication flow run through the LGN?
1. M-layers
2. P-layers
What are the characteristics of the M and P-layers?
1. The P-layers (parvocellular) are composed of neurons with small cell bodies.
They run through the top four layers of the LGN.
They are responsive to color, fine pattern details, and to stationary and slowly moving objects.
Cones provide most of the input through the P-layers.
2. The M-layers (magnocellular) are composed of neurons with large cell bodies.
They run through the bottom two layers of the LGN.
They are responsive to movement.
Rods provide most of the input through the M-layers.
Where do these neurons project to?
To the lower layer of Cortical Layer IV: from here they are projected to different parts of the visual cortex.
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