Lecture 2 - Neuro Systems and Pathways

Question 1

In the motor systems, ______ is resposible for the primary motor action, while extra______ is responsible for modifying (fine-tuning) the motor response.

Answer 1

Pyramidal

Extrapyramidal

Question 2

What is the difference in composition of Grey matter vs White matter in the CNS?

Answer 2

Grey –> neuronal cell bodies, glial cells, dendritic cells

White –> myelinated (hence the white color) axon pathways

Question 3

Sensory information from the body is relayed to the contralateral side of the brain. This information typically crosses to the contralateral side within the _____ _____, but Proprioceptive and vibrational information crosses within the ______ instead.

Answer 3

Spinal Cord

Medulla

Question 4

The Internal Capsule houses the bundles of fibers that coalesce from the _____ _____ (aka central Semiovale). The Posterior limb of the Internal Capsule typically conducts ______ information, while the Anterior limb typically conducts ______ information.

Answer 4

Corona Radiata

Sensory (should make sense since the Somatosensory cortex is posterior to the central sulcus)

Motor (should make sense since the Primary Motor cortex is anterior to the Central sulcus)