Subdivisions of the Nervous system

Question 1

Describe the primary motor cortex

Answer 1

Neurons in different regions of the motor cortex connect to muscles in different regions of the contralateral side of the body.

Question 2

What are Broadmann areas

Answer 2

• A Brodmann area is a region of the cerebral cortex defined based on its cytoarchitectonics, or structure and organization of cells
• In man he distinguished 46 areas, each carrying an individual number and some being further subdivided

Question 3

Structures of the hindbrain

Answer 3

Medulla
Pons
Reticular formation
Cerebellum

Question 4

Describe the cortex

Answer 4

The outermost, wrinkled layer of the brain; comprised of left and right hemispheres, connected by corpus callosum
Each hemisphere can be further divided into four lobes:
Frontal lobe
Temporal lobe
Parietal lobe
Occipital lobe

Question 5

Structures of the limbic system

Answer 5

Thalamus
Hypothalamus
Hippocampus
Amygdala

Question 6

Function of the left hemisphere

Answer 6

Specialises in tasks that involve sequence and analysis (language, speech, handwriting, maths)

Question 7

Function of the right hemisphere

Answer 7

Processes information in a more global sense (perception; visualisation; spatial perception; recognition of patterns, faces and emotional expression)

Question 8

describe somatotopic organization

Answer 8

body parts we use more have a larger segment of the primary motor cortex

Question 9

Describe the somatosensory cortex.

Answer 9

It receives information from the body senses; different regions receive information from different parts of the body

Question 10

Describe the Autonomic Nervous system

Answer 10

ANS controls automatic functions of the body.
It is split into the sympathetic division and the parasympathetic division.

SYMP = fight or flight (stressful situations.
PARA = rest (restores normal functioning after arousal)

Question 11

Describe the somatic nervous system.

Answer 11

it controls voluntary muscles of the body.
Split into the sensory pathway and the motor pathway.

SENSORY = carries info to the spinal cord or the brain
MOTOR = carries into to voluntary skeletal muscles

Question 12

What is the Bell-Magendi Law

Answer 12

• dorsal roots carry sensory information to the CNS - AFFERENT
• ventral roots carry motor information to the muscles and glands away from the CNS - EFFERENT

Question 13

Where do the sympathetic nerves originate from?

Answer 13

Thoracic and lumbar regions of the spine

Question 14

Where do parasympathetic nerves originate from?

Answer 14

the cranial and sacral regions of the spine