Retinal Pathway

Retinal Pathway

To the tune of “Heartbreaker” by Pat Benatar

[Verse 1]
Light strikes photoreceptors at the back of the eye
This causes the photoreceptors to hyperpolarize

[Pre-Chorus]
Rods are specialized for conditions of low luminance
Cones are specialized for more light and colour imaging

[Chorus] 
The graded potential is transmitted to bipolar cells
The graded potential is transmitted to the bipolar cells

[Verse 2]
Hyperpolarization blocks release of glutamate
The ON-bipolar cells, they are activated

[Pre-Chorus]
Diffuse bipolar cells are common in the periphery
Midget bipolar cells signal to the cones exclusively

[Chorus] 
The graded potential is transmitted to ganglion cells
The graded potential is transmitted to the ganglion cells

[Pre-Chorus] 
P ganglion cells receive input from the midget cells
M ganglion cells receive input from the diffuse cells

 [Chorus]
The action potential is transmitted through the optic disk
The action potential is transmitted through the optic disk
The action potential is transmitted through the optic disk
The action potential is transmitted through the optic disk