Nervous System - Brain & Meninges

Question 1

Meninges layers (outer to inner)

Answer 1

dura, arachnoid, pia

Question 2

dura mater

Answer 2

tough, fibrous outer layer
has inner & outer layers with venous sinuses between them

Question 3

arachnoid mater

Answer 3

between dura and pia
underneath subarachnoid space which is CSF filled

Question 4

pia mater

Answer 4

thin and delicate layer
attaches directly to the brain tissue

Question 5

ventricular system

Answer 5

lateral ventricles (1st & 2nd) - 3rd ventricle - cerebral aqueduct - 4th ventricle - subarachnoid space

Question 6

what is csf produced by

Answer 6

chloroid plexus

Question 7

cerebrum parts & functions

Answer 7

frontal: motor control, problem solving
parietal: sensory processing
temporal: hearing, memory
occipital: vision

Question 8

cerebellum parts & functions

Answer 8

brainstem (midbrain, pons, medulla oblongata): breathing and heart rate

Question 9

primary motor cortex & corticospinal tract (efferent)

Answer 9

primary motor cortex in frontal lobe

corticospinal tract:
- upper motor neuron starts in cortex
- crosses in medulla
- synapses on lower motor neuron
- lower motor neuron exits through ventral root

Question 10

primary somatosensory cortex & dorsal column pathway (afferent)

Answer 10

primary somatosensory cortex in parietal lobe

dorsal column pathway:
- sensory neuron enters through dorsal root
- ascends spinal cord
- synapses & crosses in medulla
- synapses again in thalamus
- projects to somatosensory cortex