Cell Bio 2 Exam 2 L25: Neural Plasticity Finale

-light activates cells

• -"simple" processing occurs (contrast) 
•        *adjacent light/dark regions (edges and spots)

information exchanged between sides

• small region of the midbrain
• integration area (visual, auditory, muscular,...)

• Rear part of the cortex
• Higher order processing
• Visual representations and memories

In the superior colliculus

auditory sensation and skeletal position

• superior colliculus neurons correspond to retinal activity (the recepetive field)
• activity is the most prominent in the center of the field

superior colliculus neurons correspond to auditory wave interference (receptive field in auditory space instead of visual)

• center of the auditory receptive field corresponds to 0 us time difference
•       *noise takes the same time to reach each ear
•       *movement to one side or the other corresponds to a delay in reaching the farther ear

noise reaches ears at difference times denoting location

when an owl hears a sound it looks directly at it

prisms on the eyes shifted vision to the left 23 degrees

a naive animal hears the sound, looks forward, but sees the object to the left

a learned animal knows how to turn its head and eyes to properly align the visual and auditory field

in an owl the critical period is 200 days, if the prisms are removed before then it recovers, if theyre removed after it doesn't