Anatomical orientation II

Question 1

Sulci (sulcus) and gyri (gyrus)

Answer 1

• covers the surface of the brain
• surface is folded and 2/3 is hidden => increases the surface area
  Note: surface is not smooth

Gyrus = ridge (like a bridge)
Sulcus = groove between rridges

Question 2

Contralateral control
Ipsilateral
Decussate

Answer 2

• opposite side, e.g. left brain controls right side of the body
• same side, which occurs in some parts of the cerebellum (olfactory and taste ARE uncrossed)
• cross over (e.g. sensory and motor fibers cross over)

Question 3

Topographical organization of the brain

Answer 3

there is somatotopic mapping which is what we look like according to the brain