Revision of neuroanatomy Flashcards
1
Q
Sympathetic NS
A
thoracolumbar, T12-L2
2
Q
PS NS
A
CN 3,7,9,10
S2-4
3
Q
Cerebellar lesion sx
A
DANISH
Ipsilateral signs
4
Q
Medial longitudinal fascicles
A
- Pathway joining CN3 nucleus to CN6 nucleus
- Allows eyes to move together
- Injury = internuclear ophthalmoplegia
- Lesions cause impaired adduction in one eye and horizontal nystagmus of other abducting eye
5
Q
CN3 reflex pathway
A
- Normally, both pupils will constrict if a light is shined in one eye (consensual response) - impairment of one optic nerve causes Marcus Gunn reflex which is where pupils dilate if light is shone in normal then abnormal pupil → RAPD
- Lesions in midbrain may result in pupils that accommodate but no reaction to light - Argyll Robertson pupil in syphilis
6
Q
Which CN from midbrain
A
1-4
7
Q
Which CN from pons
A
5-8
8
Q
Which CN from medulla
A
9-12
9
Q
Which area of the body does the fasciculus gracilis control
A
Legs
10
Q
Which area of the body does the fasciculus cuneatus control
A
Arms
11
Q
CSF formation pathway
A
- From choroid plexus in lateral ventricles
- Lateral ventricle → foramen of Monroe → third ventricle → cerebral aqueduct of sylvius → fourth ventricle → foramina of Lusckka (lateral) and Magendie (midline) → spinal cord
- Blockage in brain = hydrocephalus
- Blockage in spinal cord = syringomelia
12
Q
Anterior cerebral artery blockage
A
No leg movement opposite side of body
13
Q
Middle cerebral artery blockage
A
No arm movement opposite side of body
14
Q
Posterior cerebral artery blockage
A
no face movement opposite side of body - on both eyes, half of visual space will be lost (homonymous hemianopia)
15
Q
Where does spinal cord terminate
A
L2
