Central Nervous System

Question 1

CNS

Answer 1

Collects and processes information from the outside environment
Organises working of diff organs in the body

Split into CNS + PNS

Question 2

spinal cord

Answer 2

Responsible for producing reflex actions such as pulling your hand away from a hot plate
Passes messages to+ from brain and links it to the peripheral nervous system ( PNS)

Question 3

Brain

Answer 3

Source of our conscious awareness and where decison making takes place.
Made up of many structures such as corpus callum and cerebal cortex

Divided into two identical hemispheres:right + left.
Brains control of the body is contralateral where the RH controls the left side of the body and LH controls the right side of the body.

Things are divided into cortial ( in cortex)
Or subcortial (below the cortex.)
Cerebal cortex covers the inner parts of the brain and is 3 mm thick

Question 4

Thalamus

Answer 4

Subcortial.

Plays a role in processing information from the senses
Touch, sight, hearing
Also does intial processing on its own , acts as a “filter”/“gate”
Plays a role in wakefulness, sleep, OCD

Question 5

Hypothalamus

Answer 5

Subcortial.
Below the thalamus
Controls motivational behaviours such as hunger, thirst , sex.
Regulates activity in the endocrine system.
Produces fight/flight response.
Involves in maintaing balance of temperature: homeostasis

Question 6

Limbicsystem

Answer 6

Contains structures like the amygdala which controls + regulates emotional responses

Also plays a role in memory+ learning

Question 7

Cerebellum

Answer 7

Co ordinates balance, posture, movement 
Contains two hemispheres :left ,right
Contains 50% of the brains neurons
Highly wrinkled 
Receives info from spinal cord

Question 8

Corpus callaosum

Answer 8

Dense collection of neurons physically connects the two hemispheres together
Allows communication between the two hemispheres

Question 9

Lateralisation and localisation

Answer 9

Laterliasation = specific functions associated with a side of the brain e.g language = left side

Localisation = specific functions associated with specific areas , localisation

Question 10

Cerebal cortex .2

Answer 10

Contains two hemispheres 
Very wrinkly 
Contains 4 lobes=
Frontal lobe 
Temporal lobe
Parietal lobe
Occupitital lobe

Question 11

Frontal lobe

Answer 11

Controls thinking, decison making, problem solving
Contains motor cortex= long strip of neurones that run along the central sulcus of both hemispheres
Controls voluntary movements of opposite side of the body = contralateral
Also contains brocas area lol

Question 12

Parietal lobe

Answer 12

Processes sensory information from the Skin

Question 13

Temporal lobe

Answer 13

Contains auditory cortex which deals with sound information from the opposite ear
Processes sound, volume, pitch - helps to understand language

Question 14

Occupitital lobes

Answer 14

Contains visial cortex

Processes visual information

Question 15

Brocas area

Answer 15

Involved in regulating breathing patterns and vocalisations that are required for normal speech

Question 16

Wernicles area

Answer 16

Contains neurones that are involved in speech comprehension

Question 17

If damaged

Answer 17

If brocas is damaged = lack of fluency in speech, slow , labarious

If wernicles is damaged = difficulty understanding speech