Exam 20: Central Nervous System

The vermis lies between the two hemispheres of the cerebellum.

Cerebrospinal fluid is not found in the subarachnoid space.

The medial lemniscal system involves crude touch sensations, whereas the spinothalamic pathway involves more discriminating touch and pressure sensations.

Audition is a function of the _____ lobe.

Besides protection, the cerebrospinal fluid helps regulate:

Describe the structure and major functions of the brainstem.

Explain the location and function of primary, secondary, and tertiary sensory neurons. Which of these neurons can decussate?

Explain how the cerebrum and cerebellum are similar to a negative-feedback mechanism in terms of controlling the movement of skeletal muscles.

The location of the crossing of the left and right optic nerves is called the epithalamus.

Impulses sent over which of the following tracts could result in voluntary movement, especially of the hands, fingers, feet, and toes of the opposite side?

Most of the motor tracts of the central nervous system do not decussate.

The cerebellum coordinates both incoming and outgoing motor information.

Extrapyramidal tracts can function either to inhibit or to facilitate lower motor neurons.

Which part of the brain releases the hormone melatonin?

Axons from the gray horns of the spinal cord terminate in:

Explain the functions of the thalamus.

What structure is the deepest groove in the cerebrum?

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

Which of the following is not true of the lateral corticospinal tract fibers?

All of the 12 cranial nerves come from one of the three parts of the brainstem.