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Spinal Cord, Nerves, ANS > Spinal Cord, Nerves, ANS > Flashcards

Spinal Cord, Nerves, ANS Flashcards

1
Q

Conus medullaris

A

Terminal Portion of Spinal Cord

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2
Q

Cauda Equina

A

Location=Lumbar Cistern (subarachnoid space)

  • Includes conus medullaris and filum terminale
  • Dorsal and Ventral Rootlets located with the subarachnoid space are directed towards the intervertebral column
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3
Q

Dura Mater

A

Tough mother…epidural space

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4
Q

Arachnoid Mater

A

Subarachnoid space

-lumbar cistern

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5
Q

Pia Mater

A 
Denticulate Ligaments (anchor cord)
Filum Terminale -extends down from conus and give longitudinal support
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6
Q

Rootlets

A

within subarachnoid space directed toward intervertebral foramen

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7
Q

Dorsal Root

A

Sensory neurons

-has ganglion outside spinal cord (Dorsal root ganglion-in the intervertebral foramen)

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8
Q

Ventral Root

A

Motor neurons contained in connective tissue sheath

-cell bodys in ventral horn of spinal cord

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9
Q

Endoneurium

A

Inner most connective tissue covering mixed nerves
Cover Nerve Fiber and enclose myelin
-Fluid here indicates injury in part of periphery

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10
Q

Perineurium

A

Enclose a fasicle (bundle of fibers)

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11
Q

Epineurium

A

Surround Multiple Fascicles and blood vessels

-dura and arachnoid sleeve invaginate

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12
Q

Vasa Nervorum

A

Small arteries that supply blood to peripheral nerves …interior nerves and their coverings

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13
Q

Dorsal Primary Ramus

A

Synovial joints of vertebral column
Deep muscles of back
Overlying skin of back

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14
Q

Ventral Primary Ramus

A

Remaining areas of trunk, upper and lower limbs

Form Plexus

  • Cervicle Plexus (C1-C5)
  • Brachial Plexus (C5-T2)
  • INtercostal Nerves (T1-T11)
  • Lumbar Plexus (T12-L4)
  • Sacral Plexus (L4-S5)
  • Coccygeal Nerve (Co)
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15
Q

General Sensory (General Somatic Afferent)

A

Transmits pain, temp, touch, pressue and proprioception to spinal cord

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16
Q

Somatic Motor (General Somatic Efferent)

A

Tranmits impulses from spinal cord to skeletal muscle

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17
Q

Visceral Sensory (General Visceral Afferent)

A

Transmit reflex pain from viscera, glands, mucous membranes and blood vessels to spinal cord

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18
Q

Visceral Motor (General Visceral Efferent)

A

Transmit impulses from CNS to smooth muscle and glandular tissue (ANS)

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19
Q

Sympethetic Division of ANS-Presynaptic

A

Fight or Flight=Norepinephrine

LATERAL HORN=Cell bodies = presynaptic (preganglionic) neurons located INTEROMEDIOLATERAL CELL COLUMN of the spinal cord T1-L2/3

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20
Q

Sympethetic Division-Postsynaptic (paravertebral)

A

Paravertebral ganglion
-Sympathetic trunk (chain)= extend from C1 where the right and left chains join at the ganglion impar at sacrococcygeal vertebral junction

21
Q

Sympethetic Division-Postsynaptic (prevertebral)

A

Surround origins of the main branches of the abdominal aorta

22
Q

White Rami Communicans

A

Connection of sympathetic trunk to spinal nerve

  • Myleninated presynaptic axons
  • T1-L2
23
Q

Gray Rami Communicans

A

Connection of sympathetic trunk to spinal nerve

  • unmyelinated postsynaptic axons
  • Thoughout sympathetic chain
24
Q

Courses of Presynaptic Sympathetic Fibers

A

Enter spinal nerve via VENTRAL ROOT

  • Enter sympathetic trunk via WHITE RAMI Communican
  • Can choose to synapse immediately
  • Can choose to ascend or descend the sympathetic trunk w/o synapsing….splanchnic nerve to prevertebral ganglion
25
Q

Course of Postsynaptic Sympathetic Fibers

A

Run through GRAY MATTER Communicans

26
Q

Postsynaptic fibers of Head

A

-Head: follow branches of the carotid artery

27
Q

Postsynaptic fibers of Gut

A

-Splanchnic Nerves follow branches of abdominal aorta

28
Q

Postsynaptic Fibers-Visceral Afferent Neurons

A

Run with the sympathetic division of ANS in a dermatomal pattern

29
Q

Head and Neck

A

T1-T4 (Visceral Afferent-Symp)

30
Q

Heart and Lungs

A

T1-T7 (Visceral Afferent-Symp)

31
Q

Upper Extremity

A

T5-T7 (Visceral Afferent-Symp)

32
Q

GI System

A

T2(esophagus) -L2 (rectum) (Visceral Afferent-Symp)

33
Q

Liver and Gall Bladder

A

T6-T9 (Visceral Afferent-Symp)

34
Q

Pancreas and Splean

A

T5-T11 (Visceral Afferent-Symp)

35
Q

Urinary System

A

T10-L2 (Visceral Afferent-Symp)

36
Q

Testes/Ovaries

A

T10-T11 (Visceral Afferent-Symp)

37
Q

Uterus and Cervix

A

T10-L2 (Visceral Afferent-Symp)

38
Q

Prostate

A

L1-L2 (Visceral Afferent-Symp)

39
Q

Lower Extremities

A

T10-L2 (Visceral Afferent-Symp)

40
Q

Parasympathetic (CranioSacral)

A

Rest and Digest=Acetylcholine

41
Q

Parasympathetic-Presynaptic

A

Cell Bodies=

  • CN III, VII, IX, X (salivate, and see food)
  • Sacral Segments 2-4
42
Q

Parasympathetic-Postsynaptic

A

Within the wall of the organ it innervates

43
Q

Shoulder

A

C3/4 Dermatome

44
Q

Thumb

A

C6 dermatome

45
Q

Armpit

A

T1/2 dermatome

46
Q

Nipple

A

T4 (always) dermatome

47
Q

Inguinal

A

L1 dermatome

48
Q

Big toe

A

L4 dermatome

Spinal Cord, Nerves, ANS (1 decks)

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