Neuro quiz 1 Flashcards
Cranial nerves
1 olfactory
2 optic
3 oculomotor
4 trochlear
5 trigeminal
6 abducens
7 facial
8 vestibulocochlear
9 glossopharyngeal
10 vagus
11 accessory
12 hypoglossal
The facial nerve innervates the muscles of
Facial expression (motor)
Innervates the orbicularis oculi
Cranial nerve 9
Gag reflex- sensory
Swallow- motor
The SLN and RLN branch off of the __ nerve
CN X
The SLN contains which branches?
Internal branch- sensory
External branch- motor (cricothyroid)
Injury to the ___ nerve is more dangeorus, as it innervates of of the intrinsic muscles of the larync except for the cricothyroid
RLN
CN X and how it affects the hear, lungs, GI system
Heart- PNS innervation to the SA and AV node
Lungs- PNS causes vasodilation and bronchoconstriction
GI- PNS stimulates smooth muscle contraction and glandular secretions
Components inside the cranium
Brain- 80%
Blood- 10%
CSF- 10%
Branches off the aorta
Innominate- turns into the R subclavian and the R carotid
Left carotid
L subclavian
Circle of willis
The vertebral arteries arise from the ___
Subclavian arteries
Arterial supply to the circle of willis
Internal carotids
Vertebral arteries
The meninges consist of
(Covers the brain and spinal cord)
Dura mater- drains CSF
Arachnoid mater- contains blood supply to brain
Pia mater- anchored by astrocytes which form the BBB
Astrocytes
Form BBB
Lobes of the brain
Frontal motor
Occipital sight
Parietal sensory
Temporal speech / auditory
Grey mater
Unmyelinated
Cell Body Grey mater
White matter
Axon white mater
Myelinated
CSF circulation
Love my 3 silly 4 lorn magpies
Lateral ventricles
Monroe (foramen of)
3rd ventricle
Sylvius (aqueduct of)
4th ventricle
Luschka (foramen of)
Magendie (foramen of)
What makes CSF
Choroid plexus in the lateral ventricles
SAH is an ___
Emergency (neurological)
SAH is usually ___, SDH is usually ___
Arterial- ruptured aneurysm
Venous
What are ventricles in the brain?
Lined by ependymal cells which help form choroid plexus
What does CSF do?
Regulate PH and electrolytes
Carry away waste
Deliver nutrients
Total volume of CSF, how much is produced
150ml total
500cc per 24 hours
