Session 3 - Meningeal Layers, Dural Folds and Venous Sinuses

Question 1

Three Meningeal Layers

Answer 1

• Pia
• Arachnoid
• Dura

Question 2

Dura layers
What does it fuse with?
Separation forms?

Answer 2

Periosteal and meningeal
Periosteum
Folds and dural venous sinuses (filled w/ venous blood)

Question 3

Dural Folds

Answer 3

Falx Cerebri

Tentorium Cerebelli

Question 4

Dural Venous Sinus Drainage

Answer 4

Internal Jugular Vein

Cavernous, superior petrosal, sigmoid, transverse and straight

Question 5

Cerebral via … veins
Scalp via … veins
(and transverse through what)

Answer 5

Bridging - transverse subdural space

Emissary - transverse through skull

Question 6

Subarachnoid haemorrhage:
Cause
Blood vessel/s
Diagnosis

Answer 6

Trauma/Spontaneous rupture
‘Circle of Willis’ branch
Lumbar puncture, sample CSF for Hb degradation products

Question 7

Pre-central gyrus

Post-central gyrus

Answer 7

1 motor cortex

1 somatosensory cortex

Question 8

Functions of:
Frontal
Temporal
Parietal
Occipital
Cerebellum

Answer 8

Frontal: Voluntary motor control, speech, social behaviour, impulse control, higher cognition
Temporal: Language, emotion, long-term memory, smell sense, hearing, taste
Parietal: Somatosensory perception, spatial awareness
Cerebellum: Co-ordination and motor learning

Question 9

Spinal nerves have … control

Answer 9

Unicortical

Question 10

Cranial nerves have …

Answer 10

Unicortical and ipsilateral cortex ‘backup’

Forehead sparing for strokes