Anatomy wk 2

Question 1

Name the 4 parts of the corpus callosum

Answer 1

Rostrum
Genu
Body
Splenium

Question 2

What thin sheet of tissue separates the anterior horn of the lateral ventricles in the mid-saggital plane

Answer 2

Septum pellucidum

Question 3

What is the septum pellucidum continuous superiorly/inferiorly with

Answer 3

Superiorly - Corpus callosum

Inferiorly - fornix

Question 4

What does the fornix do

Answer 4

Link the hippocampus with the maxillary bodies

Question 5

What bulbous projection is on the floor of the anterior horn of the lateral ventricle

Answer 5

Caudate nucleus

Question 6

What sulcus separates the hypothalamus and the thalamus

Answer 6

Hypothalamic sulcus

Question 7

List some functions of the hypothalamus

Answer 7

Links CNS to endocrine system
Produces and secretes neurohormones
Maintains circadian rhythm (sleep-wake cycle)
Maintains overall homeostasis

Question 8

What hangs down from the hypothalamus

Answer 8

Pituitary stalk (infundibulum) connecting to pituitary gland

Question 9

Dural fold covering pituitary stalk

Answer 9

Diaphragma sellae

Question 10

What 4 tiny structures is the pineal gland superior to

Answer 10

Superior and inferior colliculi

Question 11

Name the 4 components of the basal ganglia (1 is anatomically not related to the rest)

Answer 11

Caudate nucleus
Globus pallidus
Putamen
Substantia nigra

Question 12

What type of fibres make up the internal capsule + what is the role of these fibres

Answer 12

Projection fibres

Connect the cerebral hemispheres with other parts of the brain

Question 13

Name the regions of the internal capsule (3)

Answer 13

Anterior limb
Genu
Posterior limb

Question 14

What artery supplies the internal capsule

Answer 14

MCA

Question 15

Where is the red nucleus in relation to the substantia nigra of the midbrain

Answer 15

Posterior to substantia nigra

Question 16

What type of fibres (2) do the cerebral peduncles contain

Answer 16

Sensory + motor

Question 17

What type of fibres do the middle cerebellar peduncles contain

Answer 17

Sensory only

Question 18

Lentiform nucleus consists of (2)

Answer 18

putamen + globus pallidus

Question 19

Internal capsule consists of white or grey matter

Answer 19

white

Question 20

Internal capsule located between what areas of grey matter

Answer 20

caudate nucleus + thalamus medially and lentiform nucleus laterally

Question 21

What type of fibre makes up the pyramid/olive of the medulla

Answer 21

motor

Question 22

2nd order neurons of the dorsal column cross over at the medulla and travel up the pons and rest of brainstem as what tract

Answer 22

medial lemniscus

Question 23

Significant grey matter elevation of the medulla

Answer 23

olivary nuclei

Question 24

Significant grey matter features in the midbrain

Answer 24

substantia nigra

red nucleus

Question 25

Significant nuclei of the pons

Answer 25

pontine nuclei - involved in motor activity

Question 26

Spinal cord ends at what level

Answer 26

L2 in adults

Question 27

How to tell it'a a cervical section of spinal cord - consider white/grey matter size + which horn (anterior/lateral/posterior) of the grey matter is biggest

Answer 27

Large area of white matter Very little grey matter in centre compared to white most grey matter in ventral horn

Question 28

How to tell it'a a thoracic section of spinal cord - consider white/grey matter size

Answer 28

White matter bigger than grey (like cervical but overall size is smaller than cervical) t

Question 29

How to tell it'a a lumbar section of spinal cord - consider white/grey matter size + which horn (anterior/lateral/posterior) of the grey matter is biggest

Answer 29

More grey matter than white Very large ventral/anterior horn of grey matter

Question 30

Which aspect of the spinal cord receives sensory fibres

Answer 30

dorsal

Question 31

Which aspect of the spinal cord do motor fibres project down

Answer 31

ventral

Question 32

Why does the size of the ventral grey horn vary along the spinal cord (noticeably in cervical and lumbar regions)

Answer 32

due to brachial and lumbar plexus

Question 33

Opening in the base of skull of CN I

Answer 33

Cribriform plate formane

Question 34

Opening in the base of skull of CN II

Answer 34

Optic canal

Question 35

Opening in the base of skull of CN III

Answer 35

Superior orbital fissure

Question 36

Opening in the base of skull of CN IV

Answer 36

Superior orbital fissure

Question 37

Opening in the base of skull of -CN V1 - CN V2 - CN V3

Answer 37

Superior orbital fissure Foramen rotundum Foramen vale

Question 38

Opening in the base of skull of CN VI

Answer 38

Superior orbital fissure

Question 39

Opening in the base of skull of CN VII

Answer 39

Internal acoustic meatus --> facial canal

Question 40

Opening in the base of skull of CN VIII

Answer 40

Internal acoustic meatus

Question 41

Opening in the base of skull of CN IX

Answer 41

Jugular foramen

Question 42

Opening in the base of skull of CN X

Answer 42

Jugular formamen

Question 43

Opening in the base of skull of CN XI

Answer 43

Jugular foramen

Question 44

Opening in the base of skull of CN XII

Answer 44

Hypoglossal canal

Question 45

Which CNs have parasympathetic fibres (4)

Answer 45

III, VII, XI, X

Question 46

Which CNs are directly attached to brain (2)

Answer 46

I, II

Question 47

Which CNs are directly attached to midbrain (2)

Answer 47

III, IV

Question 48

Which CN is the only one to arise form posterior aspect of brain

Answer 48

CN IV

Question 49

Which CN is directly attached to the pons

Answer 49

CN V

Question 50

Which CNs emerge from the pontomedullary junction (3)

Answer 50

VI, VII, VIII

Question 51

Which CNs emerge from medulla (4)

Answer 51

IX, X, XI, XII