Brainstem Anatomy

Question 1

Three main divisions of Brainstem

Answer 1

Midbrain, pons, medulla

Question 2

Cranial nerve 1

Answer 2

enters into anterior fossa and carries olfactory info

Question 3

Cranial nerve 2

Answer 3

passes from orbit and into middle cranial fossa, carries visual information

Question 4

Cranial nerves 3, 4, 5, 6

Answer 4

emerge from brainstem within posterior cranial fossa, travel forward to reach the middle cranial fossa and through foramen in middle cranial fossa in order to exit cranial cavity

Question 5

cranial nerves 7, 8,9,10,11, and 12

Answer 5

emerge from brainstem in posterior cranial fossa, course for a short distance then exit cranial cavity via foramen in posterior cranial cavity

Question 6

Brainstem levels, rostral to caudal

Answer 6

Rostral midbrain, pons,rostral medulla,caudal medulla

Question 7

Brainstem: cross section regions

Answer 7

Tectum, Tegmentum, Basal Portion

Question 8

Tectum

Answer 8

dorsal, posterior to ventricular spaces

Question 9

Tegmentum

Answer 9

mid-region anterior to ventricular spaces (reticular formation found here)

Question 10

Basal Portion

Answer 10

ventral region

Question 11

Reticular formation

Answer 11

complex neural network in core of medulla pons and midbrain, regulates neural activity throughout the CNS. Helps regulate: resporatory and cardio functions, altertness, attention motivation, and motor movement