Neur2100 Fundamentals in Neuroscience II Quiz

The somatic nervous system is part of the peripheral nervous system that controls voluntary movement, and movement through involuntary reflex arcs.

A motor unit is composed of the cell body and dendrites of an alpha motor neuron (lower motor neuron), the axon, and all the muscle fibers that it innervates.

Proprioception is essential for motor control as it provides sensory input about muscle length, tension, and movement.

<p>A muscle fiber is a single muscle cell, whereas a myofibril is a component of a muscle fiber made up of sarcomeres.</p> Signup and view all the answers

<p>Sensory contributions to balance involve the integration of sensory signals from various sources, including proprioception, vision, and the vestibular system.</p> Signup and view all the answers

<p>Microneurography is a technique used to record neural activity from peripheral nerves, allowing researchers to study motor control and reflexes.</p> Signup and view all the answers

<p>A motor unit is the final common pathway between the nervous system and generation of force.</p> Signup and view all the answers

<p>They have elaborate dendritic trees with approximately 50,000 synaptic buttons.</p> Signup and view all the answers

<p>Cell bodies of motor neurons are located in the ventral horn of the spinal cord and exit through the ventral root.</p> Signup and view all the answers

<p>Motor neurons are arranged in a motor nucleus, which is a group of motor neurons that innervate a specific muscle.</p> Signup and view all the answers

<p>The lateral corticospinal tract is a pathway that connects upper motor neurons in the motor cortex to lower motor neurons in the spinal cord.</p> Signup and view all the answers

<p>A motor unit consists of an alpha motor neuron and all the muscle fibers that it innervates.</p> Signup and view all the answers