Week 4 Lectures

Question 1

What is the purpose of the dexterity article?

Answer 1

It defines motor and sensory pathways of hand dexterity. It also details hand dexterity and organism stimuli

Question 2

What are spinal roots?

Answer 2

Bring in new information

Question 3

What are dorsal roots?

Answer 3

Brining sensory information in

Question 4

What is the purpose of ventral roots?

Answer 4

Brings in motor information out

Question 5

What is damaged when a person cannot move something?

Answer 5

ventral roots

Question 6

What is dexterity?

Answer 6

skilled behavior by hand

Question 7

What is the purpose of vision?

Answer 7

It helps in preparing motor responses such avoiding something. It also relays stimuli

Question 8

What is the purpose of the motor cortex?

Answer 8

the area that controls motor movement

Question 9

What is the neuromuscular junction?

Answer 9

The connection between neuron and muscle

Question 10

How does the motor cortex work?

Answer 10

It works through the peripheral system that relays information through the muscles. Also works through chemical and electrical signals.

Question 10

How many muscles control hand movement?

Answer 10

20 muscles

Question 11

What is the somatosensory cortex?

Answer 11

It interprets touch and feedback comes from peripheral system and sensory root

Question 12

What is the cerebral cortex?

Answer 12

The brain’s is the outer layer

Question 13

What does the cerebral cortex surround?

Answer 13

It surrounds earlier evolved midbrain and brainstem

Question 14

How far does the brainstem extend?

Answer 14

Brainstem extends to the spinal cord

Question 15

How do neurons exit in the primary motor cortex?

Answer 15

motor neuron axon roots exit spine

Question 16

What is the primary motor cortex?

Answer 16

Controls the voluntary movements of an organism

Question 17

How does the primary motor cortex work?

Answer 17

sends long axons down spinal cord

Question 18

What are skin receptors?

Answer 18

Skin receptors are the main input that receive information.

Question 19

What is the somatosensory cortex?

Answer 19

Receives sensory information from stimuli

Question 20

How do skin receptors work?

Answer 20

Enters from skin receptors and then up to the spinal cord and lastly in the brain. Brain tells muscles to move.

Question 21

What are some of the most sensitive areas according to the homunculus?

Answer 21

According to the homunculus, the areas that are the most sensitive is the tongue and hands

Question 21

What is the cortical homunculus?

Answer 21

A distorted drawing of the human body(psych).

Question 22

What is the function of the homunculus?

Answer 22

It denotes area of the brain’s cortex devoted to body regions.

Question 23

What are mechanical lesion studies?

Answer 23

cutting lesions in the brain to observe for any changes

Question 24

What is a con in mechanical lesion studies?

Answer 24

can result in parts of the body no longer being functional

Question 25

What are electrical stimulation studies?

Answer 25

Alters the electrical activity in the brain. You apply electrodes in the brain and does not physically alter the brain.