motor system overview
TRANSCRIPT
Voluntary Motor Control
Control of voluntary movement
IdeaAssociation
cortexPremotor +
Motor cortex
Basal Ganglia
Lateral cerebellum
Movement
Intermediate Cerebellum
ExecutionPlanning
Organization of Motor Nervous System
Spinal Motor Neuron
Spinal Cord: Grey matter
Motor Unit
Neuromuscular Junction
Mechanism of Muscle contraction
Muscle Spindle
Stretch Reflex
Muscle Stretch Reflexes
Golgi Tendon Organ
Golgi Tendon Organ
Feedback Inhibition: Golgi Tendon Organ
Alpha and gamma motor neurons are coactivated during voluntary movements
Spinal Animal
Sensory Feedback for walking
Locomotor Center in Cat
Modulation of Movement by the Basal Ganglia
Motor components of the human basal ganglia
Anatomical Organization of Basal Ganglia Input
Output of Basal Ganglia
Disinhibition in the direct and indirect pathways through the basal ganglia
Organization of Cerebellum
Input of Cerebellum
Cerebellar Output
Vestibulocerebellum
Neocerebellum
The spinocerebellum contains two somatotopic neural maps of the body
Motor modulation by the cerebrocerebellum
Cerebellar Pathway
Functional Organization of the Primary Motor Cortex
The major inputs to the motor cortex in monkeys
Corticospinal Tract
Convergence of Motor Control on the Anterior Motor Neuron
Experimental apparatus developed to record the activity of single neurons in awake primates trained to perform specific movements : Ed Evarts 1960
Direct corticospinal control of motor neurons is necessary for fine control of the digits
Motor Cortical Cell Firing with Force Generated
Corticomotoneuronal (CM) cell is active depends on the motor task
Different areas of cortex are activated during simple, complex, and imagined sequences of finger movements (Xenon PET)
A. Activity in the neuron as the monkey observes another monkey make a precision group.B. Activity in the same neuron as the monkey observes the human experimenter make the precision grip.C. Activity in the same neuron as the monkey itself performs a precision grip. (From Rizzolotti et al 1996.)
Mirror Neurons