Ch 14 Dr. Mon

Front

What principle of neuron function does the population vector rely on when determining skeletal muscle movement?

Back

Action potential firing rate.

Front

Through which structure do motor nerve fibers exit the spinal cord?

Back

Ventral roots.

Front

How are ascending or descending spinal cord tracts named?

Back

They are named after the region within the CNS where they begin and end.

Front

Which area of the brain is responsible for the conscious initiation of movement?

Back

Primary motor cortex.

Front

What is the primary characteristic of Parkinson’s disease related to neuron function?

Back

The death of neurons that secrete dopamine.

Front

Which area of the basal nuclei is most affected in Parkinson’s disease?

Back

Substantia nigra.

Front

Define action potential firing rate in the context of neuron function.

Back

The frequency at which a neuron generates action potentials, influencing muscle movement.

Front

What role do ventral roots play in the nervous system?

Back

They carry motor nerve fibers from the spinal cord to the muscles.

Front

Explain the significance of the primary motor cortex in movement.

Back

It is the brain region that initiates voluntary muscle movements.

Front

What is the function of the substantia nigra in the basal nuclei?

Back

It is involved in the regulation of movement and is affected in Parkinson's disease.