Cerebrum

Question 1

What does the cerebrum consist of?

Answer 1

Consists of paired hemispheres (hemispherum)

Question 2

How are the hemispheres connected to each other?

Answer 2

They are connected via white commisural fibers

Question 3

What does the cerebrum control?

Answer 3

It controls 1. emotions, 2. conscious perception (hearing and vision), 3. voluntary muscular actions

Question 4

What lobes does the cerebrum consist of?

Answer 4

The lobes are 1. Frontal lobe (rostral), 2. Occipital lobe (caudal), 3. Temporal lobe (lateral, poorly developed) 4. Parietal lobe (between frontal and temporal bones) 5. Insula cerebri (=sunken portion of cerebral cortex)

Question 5

What does the frontal lobe do?

Answer 5

• Planning of movement
• Recent memory
• Emotions

Question 6

What does the occipital lobe do?

Answer 6

• Vision

Question 7

What does the temporal lobe do?

Answer 7

• Hearing

- Advanced visual processing

Question 8

What does the parietal lobe do?

Answer 8

• Body sensations (cold and warm)

Question 9

What is the surface of cerebrum called?

Why is the telencephalon folded?

Answer 9

The outer layer is called the cerebral cortex or pallium. It is 1,5 -3,0 mm in width. The cerebral cortex contains all the most important sensory association and motor areas.

It is to increase surface area, for nutrient intake etc.

Question 10

What is the surface of the cerebrum made of?

Answer 10

The surface is grey matter

Question 11

What is under the cortex?

Answer 11

White matter, but within there are deep masses of grey matter. These are called basal nuclei. Basal nuclei receive info from cortex to regulate motor functions

Question 12

What is corpus callosum?

Answer 12

They are transverse fibers that connect the two hemispheres (white fibers)

Question 13

The cerebrum is separated by _____________ and _________ (which is between cerebrum and cerebellum)

Answer 13

Fissura longitudinalis cerebri

and

Fissura transversa cerebri

Question 14

What does each hemisphere have?

Answer 14

Each hemisphere has a lateral ventricle and connect to 3rd ventricle via interventricular foramen (foramen interventriculare)

Question 15

Name the surfaces of the hemispheres?

Answer 15

1. Facies dorsolateralis (convex)
2. Facies medialis (flat)
3. Facies basilaris (irregular and ventrally)

Question 16

What does the hemispheres of the cerebrum contain?

Answer 16

1. Motor areas
   - Each tiny part sends out impulses to a specific muscle
2. Sensory areas
   - Receive incoming impulses
   1. General sensory area. Receives info from muscles, skin and inner organs
   2. Primary gustatory area (impulses from tongue)
   3. Primary auditory area (impulses from ears)
   4. Primary visual area (impulses from eyes)
   5. Primary olfactory area (impulses from nose)
3. Association areas
   - Interpret impulses and make decisions
   
   6. Visual association area. (produces sight)
   7. Auditory association area (produces hearing)

Also contains the limbic system(?)

Question 17

what is the oldest part of the cerebral cortex?

and this part called _________ gives rise to what?

Answer 17

Paleopallium is phylogenetically the oldest part of the cerebral cortex. It develops in the lat. aspects of the hemisphere

The paleopallium gives rise to the olfactory bulbs in higher forms

Question 18

Archipallium is what?

Answer 18

Archipallium is the olfactory part of the cerebral cortex comprising the hippocampus and part of the parahippocampal gyrus

Question 19

Neopallium is what?

Answer 19

Neopallium is the phylogenetically new part of the cerebral cortex and is the dorsolateral part of the cortex

Question 20

Limbic system in latin is?

What does the limbic system do?

Answer 20

Pars limbica rhinencephali

It is involved with emotions, motivation, basic survival, sociosexual behavior