Exam 14: A: Central Nervous System

The central nervous system includes the brain,spinal cord,and autonomic nerves.

The dorsal nerve root carries motor impulses from the spinal cord to the skeletal muscles.

Both the dorsal and ventral root ganglia in the spinal nerves contain cell bodies.

The part of the dura that extends into the longitudinal fissure is the falx cerebri.

Decussation of sensory neurons usually occurs at the secondary neuron level before reaching the thalamus.

The spinal cord completely fills the spinal cavity in the vertebrae.

The two "colorful" structures in the brain,the red nucleus and the substantia nigra,are located in the midbrain.

Each white column in the spinal cord consists of large numbers of cell bodies divided into smaller bundles called tracts.

The limbic system of the brain primarily functions in the production of speech.

Poliomyelitis results in flaccid paralysis via destruction of posterior horn neurons.

The thalamus acts as a relay station for ascending sensory impulses.

The thalamus is responsible for the associating sensory impulses with feelings of pleasantness and unpleasantness.

Rapid mitosis stops at about age 9,but the brain grows in size until about age 18.

Ascending tracts carry only sensory information,whereas descending pathways carry only motor information.

The epidural space contains a layer of fat and other connective tissue.

The infundibulum connects the hypothalamus and the pineal body.

All of the lobes of the cerebrum are named after the bones that cover them.

The conus medullaris is located at about the first lumbar vertebrae.

Once a synapse is established in the brain,it remains for life.

The hypothalamus is able to influence the functioning of both the sympathetic and parasympathetic divisions of the autonomic nervous system.