External Anatomy of Spinal Cord, Fibers, Ganglia and Meninges Flashcards Preview

Neuroscience Exam 1 > External Anatomy of Spinal Cord, Fibers, Ganglia and Meninges > Flashcards

Flashcards in External Anatomy of Spinal Cord, Fibers, Ganglia and Meninges Deck (26)
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1
Q

What is the grey matter in spinal cord?

A

neurons

sensory-dorsal
motor- ventral

2
Q

What is white matter in spinal cord?

A

fiber tracts

3
Q

What is a rootlet?

A

branches of nerve root that is closer to spinal tract

4
Q

What are the three prominent sulci in spinal cord?

A

dorsal and ventral fissure/sulci

dorsal intermediete

5
Q

What parts of spinal cord are CNS?

A

spinal cord, grey and white matter

6
Q

What parts of spinal cord are PNS?

A

dorsal root ganglia, sympathetic chain ganglia, spinal nerves

7
Q

What is meninges?

A

connective tissue that surrounds and protects brain and spinal cord

8
Q

What are the three layers of meninges deepest to superficial?

A

pia, arachnoid and dura

9
Q

Spinal nerves in cranial region?

A

all spinal nerves in cranial region exit above the vertebral body

ex. C2 nerve exits above C2 vertebral body

10
Q

How many spinal nerves in each region?

A

8- cerv
12- thor
5- lumbar
5- sacral

11
Q

What is the cervical enlargement?

A

The reason behind the enlargement of the cervical region is because of the increased neural input and output to the upper limbs.

C3-T2

12
Q

Lumbar enlargement?

A

The reason behind the enlargement of the lumbar region is because of the increased neural input and output to the lower limbs.

L1-S2

13
Q

Conus medullaris?

A

tapered lower end of spinal cord

at sacral level

14
Q

Cauda equina?

A

is a bundle of spinal nerves and spinal nerve roots, consisting of L2-coccyx nerve

15
Q

What is the brain stem region?

A

midbrain and hindbrain- cerebellum

16
Q

Nuclei of Cranial nerves?

A

sensory and motor

ex. spinal trigeminal (somatosensory)

spinal accessory nucleus (lower motor neuron)

17
Q

Reticular nuclei

A

for motor control (upper motor neurons)

consciousness

18
Q

What is the vermis?

A

located in the medial, cortico-nuclear zone of the cerebellum

aka Arbor vitae

19
Q

What is the paravermal?

A

medial hemisphere excluding vermis, area around vermis

20
Q

What are the three lobes of cerebellum?

A

A/P and flocculonodular lobe

21
Q

What is flocculonodular lobe?

A

essential in balance and motor control

contains flocculus (next to 8th cranial nerve) and nodulus

22
Q

What are the cerebellar peduncles?

A

is the part that connects cerebellum to the brain stem

23
Q

What are the main cerebellar peduncles?

A

inferior or resitform
middle or brachium pontis “arms of pons”
superior or brachium conjunctivum

24
Q

Inferior CP?

A

input and outputs from medulla and spinal cord to cerebellum, both sensory and motor

25
Q

middle CP?

A

input from pons into cerebellum

26
Q

superior CP?

A

output to midbrain and thalamus from cerebellum

also small spinocerebellar input to cerebellum