Midline Sagittal section

Question 1

What is the name of this component of the Corpus Callosum?

Answer 1

Rostrum

Question 2

What is the name of this part of the Corpus Callosum?

Answer 2

Genu

Question 3

Name this component of the Corpus Callosum.

Answer 3

Body

Question 4

Name this component of the Corpus Callosum.

Answer 4

Splenium

Question 5

Name this part and its general function.

Answer 5

Thalamus.

interconnected with the cerebral neocortex, sensory pathways(besides olfaction) are relayed to the cortex passing through the thalamus acting as a gatekeeper and modulator.

Question 6

Name this anatomical component. State its function.

Answer 6

Mamillary bodies.

Function:

• recollective memory, as transmitted from hippocampus—>fornix—>mamillary bodies.

Question 7

Name this and state its function.

Answer 7

Inferior Colliculus.

Function: channel for auditory signals and processing, in order for auditory information and visual information to be integrated together.

Question 8

Name this and state its function.

Answer 8

Superior colliculus.

Function:

• The orientation of the head with eye movement( can be also response due to somatosensory and auditory information).

Question 9

Name this, state its function and its composition.[3 marks].

Answer 9

Tegmentum.

Function:

• Co-ordination of sensorimotor information.

Components:

• Substanti nigra, Red nucleus and Periaqueductal gray.

Question 10

Name this and state its function(2 marks).

Answer 10

Anterior commissure.

Function:

• Interhemispheric communication of visual, auditory and olfactory information between temporal lobes. Whilst connecting both hemispheres along the midline.

Question 11

Name and state its function.

Answer 11

Hypothalamus.

Function:

• Homeostasis and modulation of the endocrine system through the pituitary gland.

Question 12

Name this and state its function.

Answer 12

Cerebral aqueduct.

Function:

allows cerebrospinal fluid(CSF) to flow between third ventricle and fourth ventricle.

Question 13

Name this and state its function.

Answer 13

Optic chiasm.

Function:

• The intersection of visual information from the optic nerve.

Question 14

Name this and state its function.

Answer 14

Pineal gland.

Function:

• To produce melatonin in response to light-dark cycles, increasing levels in response to night.

Question 15

Name this and state its function.

Answer 15

Fornix.

Function:

• Direct pathway of processes such as memory, cognition, emotion and sexual responses to the hippocampus.

Question 16

Name this, state its function and state what occurs after in its processes.

Answer 16

Fourth ventricle.

Function:

• After CSF passes to 4th ventricle(steps):
  
  • —–>foramina(3)
  • —-> subarachnoid space.

Question 17

Name this and state its processes involved, before and after it.

Answer 17

Third Ventricle.

Function:

• lateral ventricle—-> third ventricle—>fourth ventricle.

Question 18

Name this and state its function. And position relative to the third ventricle(2 marks).

Answer 18

Lamina Terminalis.

Function:

forms the anterior wall of the third ventricle and anterior boundary of the hypothalamus.

Ventral and anterior to the third ventricle.

Question 19

Name this and state its function.

Answer 19

Interthalamic adhesion.

Function:

Connecting the Thalamus of each hemisphere.

Question 20

Name this and state its function.

Answer 20

Septum pellucidum.

Function:

• Forms the anterior wall of lateral ventricles.
  
  • Separating frontal horns and body of ventricles in the midline.

Question 21

Name this and state its function.

Answer 21

Choroid plexus.

Function:

• Tissues which produces cerebrospinal fluid to the ventricles.
  
  • Found on the surface of all ventricles.

Question 22

Name this anatomical component and state its function.

Answer 22

Cingulate gyrus.

• Covers corpus callosum.
• Processing behaviour and emotion regulation.
• Also involved in autonomic control.