Nervous System 1 Flashcards

1
Q

What structure is indicated by the point?

A

Posterior horn (grey matter)

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2
Q

What structure is indicated by the point?

A

Lateral horn (grey matter)

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3
Q

What structure is indicated by the point?

A

Anterior horn (grey matter)

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4
Q

What structure is indicated by the point?

A

Pia mater

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5
Q

What structure is indicated by the point?

A

Arachnoid mater

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6
Q

What structure is indicated by the point?

A

Dura mater

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7
Q

What structure is indicated by the point?

A

Subarachnoid space

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8
Q

What structure is indicated by the point?

A

Epidural space

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9
Q

What structure is indicated by the point?

A

Dorsal nerve root

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10
Q

What structure is indicated by the point?

A

Ventral nerve root

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11
Q

What structure is indicated by the point?

A

Dorsal root ganglion

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12
Q

What structure is indicated by the arrow?

A

Anterior grey commissure

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13
Q

What structure is indicated by the arrow?

A

Anterior white commissure

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14
Q

What structure is indicated by the arrow?

A

Posterior grey commissure

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15
Q

What structure is indicated by the arrow?

A

Central canal

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16
Q

What is the structure indicated by the red star?

A

Telodendria

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17
Q

What is the structure indicated by the red star?

A

Axon Terminal

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18
Q

What is the structure indicated by the red star?

A

Mitochondrion

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19
Q

What is the structure indicated by the red star?

A

Synaptic Vessicles

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20
Q

What is the structure indicated by the red star?

A

Presynaptic membrane

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21
Q

What is the structure indicated by the red star?

A

Postsynaptic membrane

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22
Q

What is the structure indicated by the red star?

A

Synaptic cleft

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23
Q

What is the structure indicated by the red star?

A

Endoplasmic Reticulum

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24
Q

At what anatomical nervous tissue structure does the PNS begin?

A

Outside of the spinal cord, outside of vertebra

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25
What are the types of neuroglia in the CNS?
Four types: - Astrocytes - Oligodendricytes - Microglia - Ependymal Cells
26
What are the functions of Astrocytes?
Control the interstitial environment Maintain the blood brain barrier Provide framework for the CNS Regulate ion, nutrient, and dissolved gas concentrations Repair damaged nervous tissue - form scar tissue Guide neuron development Absorb and recycle neurotransmitters
27
What are the functions of Oligodendrocytes?
Myelinate the CNS axons Structural framework
28
What are the functions of Microglia?
Remove cell debris, wastes, and pathogens by phagocytosis
29
What is the function of Ependymal cells?
Line ventricles (brain) and central canal (spinal cord) assist in production, circulation and monitoring of CSF
30
What is the structural difference between white and grey matter in the spinal cord?
White matter includes myelinated axons. Grey matter includes neutron cell bodies, dendrites, and unmeylinated axons
31
What type of cells are Ependymal cells?
cuboidal and columnar
32
What are the types of neuroglia in the PNS?
Two types: Satellite cells Schwann Cells
33
What is the function of Satellite cells?
Surround neutron cell bodies - Regulate exchange of nutrients and waste products between neuron and extracellular fluid. - Isolate the neuron from stimuli not intended to pass between neurons
34
What type of Neuron is this?
Anaxonic neuron
35
What type of neuron is this?
Bipolar neuron
36
What type of neuron is this?
Pseudounipolar neuron
37
What type of neuron is this?
Multipolar Neuron
38
What are the three functional groups of neurons?
Sensory neurons Motor neurons Interneurons
39
What occurs during a chemical synaptic transmission?
40
'A neuron can synapse with how many different structures?' What are they?
41
What structures identify the beginning and end of the spinal cord (cranial to caudal)?
foramen magnum to the inferior border of the first lumbar vertebra (L1)
42
How many Cervical, thoracic, lumbar, and sacral spinal cord levels are there?
Cervical 1-8 Thoracic 1-12 Lumbar 1-5 Sacral 1-5
43
What is the ratio of grey matter as you move caudaly? Why?
increases - as you move farther from brain Less white matter required as there is less travelling through region as you move caudal
44
What is the conus medularis? Where is it located?
Caudal to lumbosacral enlargement, inferior to L1 Tapering of the spinal cord to a cone-shape
45
What type of tissue is the Dura mater?
Dense irregular
46
What type of tissue is the Arachnoid mater?
Simple squamous epithelium
47
What type of tissue is the Pia mater?
Elastic and collagen connective tissue
48
What is the film terminale? What ligament does it form?
The spinal dura mater tapers and blends with filum terminale, forming coccygeal ligament. Filum terminale extends from conus medullaris (L1) and connects spinal cord to first coccygeal vertebra
49
What is grey matter composed of?
Neuron cell bodies Dendrites Unmyelinated axons
50
What is white matter composed of?
myelinated axons
51
Cell bodies of neurons in the CNS organize to form what?
Nuclei, which have specific functions (e.g. sensory nuclei and motor nuclei)
52
Cells bodies of neurons in the PNS organize to form what?
Columns, which contain tracts that either carry sensory information or motor information
53
Cervical cranial nerves take their name from the vertebra superior or inferior to them?
inferior, so there are 8 cervical nerves and 7 cervical vertebra
54
Thoracic cranial nerves take their name from the vertebra superior or inferior to them?
inferior, so there are 12 thoracic vertebra as well as nerves
55
What type of axons is a spinal nerve composed of
56
Through what osseous structure do spinal nerves exit the spinal column from
Transverse foramen
57
What is a dermatome?
The supply of spinal nerves to a specific region of the skin
58
What is a myotome?
A group of muscles innervated by a single spinal nerve root
59
A plexus forms what rami?
Ventral root rami
60
What are the 4 plexuses and their spinal cord segments?
Cervical (C1-C4) Thoracic (C5-T1) Lumbar (T12-L4) Sacral (L4-S4)
61
What is significant between the lumbar and sacral plexuses
both innervate muscles of the lower limbs Often referred as the lumbosacral plexus
62
What are the 5 terminal branches of the brachial plexus?
Axillary Musculocutaneous Radial Ulnar Median
63
What regions of the arm does the Axillary brachial plexus innervate?
Deltoid and teres minor
64
What regions of the arm does the Musculocutaneous brachial plexus innervate?
Flexors of arm, sensory of forearm
65
What regions of the arm does the Radial brachial plexus innervate?
Extensors of arm and forearm
66
What regions of the arm does the Median brachial plexus innervate?
Flexor of forearm, sensory of anterolateral hand
67
What regions of the arm does the Ulnar brachial plexus innervate?
Ulnar half of forearm
68
The brachial plexus passes under what bone?
Clavicle*
69
The sciatic nerve is covered by what lateral rotator of the hip?
Piriformis*
70
What nerve is found in the popliteal fossa?
Tibial nerve*
71
What nerve wraps around the head of the fibula?
Common fibular nerve*
72
What nerve passes under inguinal ligament?
Femoral nerve*
73
What nerve passes behind the medial epicondyle?
Ulnar nerve*
74
What nerve passes through the carpal tunnel?
Median nerve*