Exam 14: A: Central Nervous System

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

Based on the system of naming tracts in the spinal cord,the spinocerebellar tract would be an ascending tract.

The lateral fissure separates the cerebellum from the rest of the brain.

The pyramids are two bulges of white matter on the ventral surface of the pons.

The somatic senses include vision,hearing,and olfaction.

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

The cerebrospinal fluid is absorbed into the venous blood by the median foramen of Magendie.

Extrapyramidal pathways are more often associated with emotional expressions than are pyramidal pathways.

Changes in the oxygen content of the cerebrospinal fluid cause a homeostatic response in the respiratory control center.