Spinal Cord Nerves

Question 1

3 functions of a spinal cords

Answer 1

conduction: sensory
locomotion: motor
reflexes: decision made in spinal cord

Question 2

how many spinal nerves are there

Answer 2

31

first pair pass between the skull and vertebra C1, and the rest pass through the intervertebral foramina

Question 3

medullary cone

Answer 3

end of spinal nerves around L1 area

Question 4

ventral median fissure

dorsal median sulcus

Answer 4

know on spinal cord

Question 5

cauda equina

Answer 5

l2 to s5

Question 6

meninges

Answer 6

From superficial to deep, they are the dura mater(epidural space), arachnoid mater(cerebrospinal fluid (CSF)

Question 7

terminal filum

Answer 7

forms part of the coccygeal ligament that anchors the cord to vertebra L2) (end of horse tail)

Question 8

denticulate ligaments

Answer 8

anchors the cord)

Question 9

ascending(sensory) and descending(motor)

Answer 9

3 ascending sensory

2 descending motor

Question 10

nerve anatomy

Answer 10

Endoneurium (nerve fiber)
Perineurium (fascicles)
Epineurium (nerve)

Question 11

afferent vs efferent

Answer 11

A comes before e and sensory comes before motor

Question 12

somatic nerves

Answer 12

The somatic nervous system is the part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles. The SoNS consists of afferent and efferent nerves

Question 13

visceral nervous

Answer 13

autonomic nervous system (ANS or visceral nervous system or involuntary nervous system) is the part of the peripheral nervous system that acts as a control system that functions largely below the level of consciousness to control visceral functions,[1] including heart rate, digestion, respiratory rate, salivation, perspiration, pupillary dilation, micturition (urination), sexual arousal, breathing and swallowing. Most autonomous functions are involuntary but they can often work in conjunction with the somatic nervous system which provides voluntary control.

Question 14

dorsal root vs ventral root

Answer 14

dorsal root (sensory)
ventral root (motor) 
dorsal root ganglion, so no ventral root ganglion

Question 15

ramus

Answer 15

an arm or branch of a bone, in particular those of the ischium and pubes or of the jawbone.

Question 16

sympathetic vs parasympathetic

Answer 16

The sympathetic system is fight or the flight system and its nerves direct more blood to the muscles whereas decreases blood supply to the gut.It increases the heart rate and blood pressure and also activates the body’s mechanisms to provide immediate energy to face the stressful state.So this system utilizes the body’s energy resources just to prepare it for some upcoming stressful state.

The parasympathetic system is rest and digest system.It increases the blood supply to gut and increases the digestion.So it tries to restore the body’s energy sources.

Question 17

ventral vs dorsal rami

Answer 17

ventral is usually larger then posterior roots.

Question 18

somatic sensory

Answer 18

General sensory input widely distributed throughout the body; innervated by spinal afferents and General Somatic Afferent (GSA) cranial nerves (e.g. touch-pressure, hot-cold, pain)

Question 19

visceral sensory

Answer 19

review slide 25

Question 20

visceral motor (autonomic)

Answer 20

review slide 25

Question 21

somatic motor

Answer 21

The somatic nervous system (SoNS Or voluntary nervous system) is the part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles.

Question 22

cervical plexus

Answer 22

ventral rami c1 -c5

Question 23

phrenic defined

Answer 23

of or relating to the diaphragm

Question 24

brachial plexus

Answer 24

ventral rami (c5-t1)

Question 25

ended at slide 31

Answer 25

*