Slide 1

What’s the motor system?

Plan

Motor systems

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Hierarchical & Parallel Organization of the motor systems

Organization of Movements

Organization of Movements

Reflexes

Knee Jerk

Reflexes

Why Disynaptic?

Spinal Circuits

Spinal Circuits

Motor I/O

Motor I/O

Postural adjustments

Voluntary movements

Voluntary movements

The goal of voluntary movements is represented… somewhere

Voluntary movements are
organized by motor programs

Kinematic & Dynamic Programs
in Reaching

Summary

Motor systems

Motor systems

Motor Pathways Hierarchy

Motor pathways organized around the motor nuclei

Spinal Motor Columns

Ventral Horn
Organization:
Proximal - distal rule

Ventral Horn
Organization:
Proximal - distal rule

Brain Stem Motor Paths

Brain Stem Pathways

Slide 38

Cortical
Motor
Paths

Cortical motor paths

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Slide 44

Why bother study the motor pathways?

Slide 46