Psych-4-19 lecture

Psych-4-19 lecture - Click to edit Master subtitle style...

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Unformatted text preview: Click to edit Master subtitle style 2/21/11 Review corticospinal tract The basal ganglia and cerebellum and movement Integration of somatosensory 2/21/11 Corticospinal The corticospinal tracts synapse with interneurons and motor neurons located in the ventrolateral part of the spinal cord Interneurons project to motor neurons Motor neurons project to muscles of the body Ventral tract moves muscles of The midline of the body Lateral tracts move limbs and digits 2/21/11 Kolb & Whishaw, An Corticospinal 2/21/11 Kolb & Whishaw, An Spinal Cord to Muscle 2/21/11 Force Hypothesis (Evarts, 1968): Characteristics of motor cortex neurons Planning and initiating movements Discharge before and during movements and code force of movements Neurons increase their rate and duration of firing in response to heavier weights Investigating Neural Control of Movement Kolb & Whishaw, An Introduction to Brain and Behavior , Directional Hypothesis (Georgopoulos and colleagues, 1999) : Characteristics of motor cortex neurons Detailed coding of direction Each neuron was maximally active when the monkey moved its arm in a particular direction Involved in calculating both the direction and distance The Motor Cortex and Skilled Movements Investigating Neural Contro 2/21/11 How Motor-Cortex Nudo and colleagues (1996): Damaged part of motor cortex that controlled the hand in monkeys Without rehabilitation: The hand area of the motor cortex became smaller...
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Psych-4-19 lecture - Click to edit Master subtitle style...

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