Cerebrum

Question 1

How does the cerebrum work?

Answer 1

• receives sensory information
• interprets it with respect to that stored from previous experiences
• then send impulses along motor neurones to effectors to produce an appropriate response

Question 2

What is the cerebrum responsible for?

Answer 2

coordinating all of the body’s voluntary responses as well as some involuntary ones

Question 3

What is the structure of the cerebrum?

Answer 3

• highly convoluted
  
  • increased surface area
  • and therefore its capacity for complex activity
• split into left and right halves known as the cerebral hemispheres
• has an outer layer known as the cerebral cortex

Question 4

What are the functions of the cerebral hemispheres?

Answer 4

• each half controls one half o f the body and has discrete area which perform specific functions
  
  • these areas are mirrored in each hemisphere

Question 5

What is the function of the cerebral cortex?

Answer 5

• most sophisticated processes such as reasoning and decision-making occur in the frontal and prefonal lobe of the cerebral cortex

Question 6

Where do the sensory areas within the cerebral hemispheres receive information from?

Answer 6

receptor cells located in sense organs

Question 7

What is the size of the sensory area propotional to?

Answer 7

• the relative number of receptor cells present in the part of the body

Question 8

Where is the information received passed onto?

Answer 8

• passed onto areas of the brain known as association areas
• to be analysed and acted upon

Question 9

After the associated areas, where is information passed onto?

Answer 9

• impulses come into the motor areas where motor neurones send out impulses
• the size of the motor area allocated is in propotion to the relative number of motor endings in it

Question 10

What is the main region which controls movement?

Answer 10

the primary motor cortex located at the back of the frontal lobe

Question 11

What happens in the base of the brain? Include an example?

Answer 11

• in the base of the brain, impulses from each side of the body cross
  
  • left hemisphere receives impulses from the right-hand side of the body vice versa
• inputs from the eye pass to the visual area in the occipital lobe
  
  • right eye - visual cortex in left hemisphere
  • through the integration of these inputs, the brain is able to judge distance and perspective