Lecture 1 - Cerebrum

Question 1

what are the 2 sections of the cerebrum?

Answer 1

precentral gyrus (primary motor cortex)
postcentral gyrus (primary somatic sensory cotrex)

Question 2

what is the central sulcus?

Answer 2

sulcus between pre and post central gyri

Question 3

which is the dominant hemisphere?

Answer 3

left side - math and speech

Question 4

which is the non-dominant hemisphere?

Answer 4

right side - spatial perception, facial recognition, musical ability

Question 5

what are the 3 primary motor areas?

Answer 5

1. motor cortex
2. premotor area
3. broca’s area

Question 6

what is the motor cortex?

Answer 6

in the precentral gyrus, nerve cell bodies of UMN of pyramidal tracts, voluntary contraction of skeletal muscle

Question 7

what is the premotor area?

Answer 7

anterior to motor area (frontal lobe), extrapyramidal neurons, controlled skilled learned motor activities of repetitive nature

Question 8

what is broca’s area?

Answer 8

dominant hemisphere, frontal lobe, motor speech

Question 9

what are the primary sensory areas? (6)

Answer 9

1. somatic sensory cortex (postcentral gyrus)
2. primary taste cortex (parietal lobe)
3. primary olfactory cortex (temporal lobe)
4. primary auditory cortex (temporal lobe)
5. primary visual cortex (occipital lobe)
6. wernicke’s area/sensory speech (dominant hemisphere)