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Neurophysiology of Eye Movements: Lateral Eye Movements and Basal Ganglion Connections - P, Lab Reports of Biological Psychology

An overview of the neurophysiology of lateral eye movements, focusing on the role of the abducens nucleus and the basal ganglion connections in the motor system. It covers the anatomical model, input, within, and output connections, as well as the timing and initiation of saccade movements.

Typology: Lab Reports

Pre 2010

Uploaded on 08/18/2009

koofers-user-ot4
koofers-user-ot4 🇺🇸

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Lateral Eye Movements
Abducens nucleus action potentials to
antagonist rectus muscles causes movement
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Lateral Eye Movements

  • Abducens nucleus action potentials to

antagonist rectus muscles causes movement

Motor System

Anatomical Model

-^

Basal ganglionfeedback loop

-^

Input into thePutamen

-^

Output fromGlobus Pallidusthrough thethalamus tocortical motorareas

Basal Ganglion ConnectionsWITHIN

  • Putamen

Globus

Pallidus (externaland internal)

  • Caudate

Internal

Globus Pallidus

  • Caudate

Substantia Nigra

Basal Ganglion ConnectionsOUTPUT

  • Putamen

Globus

Pallidus

Thalamus

Supplementary MotorCortex

-^

Eye Saccades:^ Caudate

Substantia

Nigra

Superior

Colliculus

Saccade Initiation• Frontal eye field area of

the frontal lobe activatesPPRF for planned eyemovements (

reading

  • Superior Colliculus can

activate PPRF due tovisual stimulus

Saccade Output Pathway

• PPRF

activatesabducensnucleus

  • Antagonistic

musclepairs areactivatedandinhibited