Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

vanessa peripheral nervous system > spinal nerves and its plexus > Flashcards

spinal nerves and its plexus Flashcards

1
Q

how many pairs of spinal nerves are there altogether ?

A

31

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

where does spinal nerves supply to?

A

all parts of the body except head and some areas of the neck

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what are the region of spinal nerves?

A 
8 cervical nerves
12 thoracic nerves
5 lumbar nerves 
5 sacral nerve 
1 coccygeal nerve
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what are the parts from the spinal cord ?

A

dorsal and ventral ramus

they both carry mixed sensory and motor fibers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what does ventral plexus unite to form?

A 
the spinal nerves from
C1-8
L1-5
S1-5
Co1 
unite and form plexus
carry sensory and motor fibres for the innervation of the kin and muscles of the limb and neck
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what are the 4 plexus it forms?

A

cervical
brachial
lumbar
sacral plexus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

which ventral rami does not form plexus ?

A

T1-T12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what does the ventral rami of T2-11 form?

A

intercostal nerves
they supply the skin and muscles of the anterolateral thorax and abdominal wall
(2-7 supply the thorax and structures within it
7-11 are atypical anterior thoraco abdominal nerves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is ventral rami T12 ?

A

subcostal nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

where does the dorsal rami of spinal nerves supply?

A

posterior body trunk area with both motor and sensory fibers via several branches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is the cranial plexus formed by?

A

by the ventral rami of the upper 4 cerivical nerves (C1-C4)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is cervical plexus?

A

Transmit sensory impulses from the skin of neck,back of head and shoulder
Most are cutaneous nerves that supply only the skin
C1 has no sensory supply
C5 have little effect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

which plexus does phrenic nerve arise from?

A

cervical plexus

C3,4,5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is the function of phrenic nerve ?

A

Supplies both motor and sensory fibers to the diaphragm

Chief muscle that cause breathing movements

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what happen if the cervical plexus is damaged ?

A

Irritation of phrenic nerve : spasms of diaphragm or hiccups

Both phrenic nerve are destroyed, diaphragm is paralysed and respiratory arrest occurs (mechanical ventilators can keep victims alive)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what is the function of Supraclavicular nerve ?

A

Supplies the skin of shoulder and clavicular region

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

where is the Supraclavicular nerve found at ?

A

cervical plexus

C3,4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

some example of what is in cervical plexus

A
  1. supraclavicular (3 and 4) they supply the skin of shoulder and clavicular region
  2. phrenic (3,4,5) serves the diaphragm , motor function
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what is brachial plexus?

A

C5,6,7,8 and T1

Innervate upper limb
Can be palpated superior to the clavicle and lateral border of sternomastoid muscle

20
Q

what happens when the radial nerve is damaged ?

A

Unable to extend at the forearm, wrist and fingers.

Unopposed flexion of wrist occurs, known as wrist-drop.

21
Q

where is the radial nerve found at and what is its function?

A

brachial plexus C5-8
Triceps brachii muscle (forearm extension)
Wrist and finger extension too

22
Q

what is the function of axillary nerve?

A

Move deltoid, teres minor and tricep

C5,6

23
Q

what happens when the axillary nerve is damaged ?

A

Loss of movement or sensation in the shoulder.

Caused by
fracture of the humerus (upper arm bone),
pressure from casts or splints,
improper use of crutches.

24
Q

where is musculocutaneous nerve found at and what is its function?

A

brachial plexus C5-7

Anterior compartment of the arm: the coracobrachialis, biceps brachii, and brachialis.

Cutaneous innervation of the lateral forearm

25
Q

what will happen when the musculocutaneous nerve is damaged?

A

Loss of sensation in the skin on the front side of the forearm.

Weakened flexion at the shoulder and elbow.

Weakened rotation of the arm.

26
Q

where is the ulnar nerve found at and what is its function?

A

brachial plexus C8,T1

Stimulates muscles in the forearm, hand and fingers so you can:
Bend and straighten the pinky and ring fingers.
Grip and hold items.

27
Q

what happens when the ulnar nerve is damaged ?

A

Weakness, loss of coordination of the fingers.

Claw Like deformity of the hand and wrist.
Pain, numbness, decreased sensation, tingling, or burning sensation

28
Q

what happens when the median nerve is damaged ?

A

Compression of this nerve in the anterior wrist make it difficult to use pincer grasp (oppose thumb)
Carpal tunnel syndrome
To test: grip an object with his thumb and index finger and try to pull the object away.

29
Q

where is the median nerve found at and what is its function?

A

brachial plexus C5-8 and T1

Flexor muscles of the forearm and hand

Protonation of forearm
flexion, abduction, opposition, and extension of the thumb.

Sensory of skin of the lateral ⅔ of the hand , palm side and dorsum of fingers

30
Q

what are some examples of nerve in brachial plexus ?

A
  1. radial nerve
  2. musculocutaneous
  3. ulnar nerve
  4. median nerve
  5. axillary nerve
31
Q

what is lumbar plexus ?

A

serve mainly the lower limb and also sends some branches to the abdomen and buttock

32
Q

what is lumbar plexus consist of?

A

spinal nerve L1-4

33
Q

what are some examples in lumbar plexus?

A
  1. femoral nerve L2-4 , innervates anterior thigh muscles, quads which are thigh extensors and flexors
  2. obturator (L2-4). motor to abduct muscles
34
Q

where can the femoral nerve be found and what is its function?

A

lumbar plexus L2-4

Innervate anterior thigh muscles, quads which are for hip flexors and knee extension

35
Q

where is the obturator nerve found at and what is its function?

A

lumbar plexus L2-4

Innervates the adductor muscles

36
Q

what is the sacral plexus?

A

they serve the buttock, lower limb, pelvic structures and perineum

37
Q

what nerves make up sacral plexus?

A

spinal nerves L4,5 S1-S4

38
Q

where is the Pudendal nerve found at and what is its function?

A 
sacral plexus (S2-4)
Supplies most of skin and muscles of perineum
39
Q

what are some examples of the nerves in ?sacral plexus

A
  1. sciatic nerve (tibial, L4-S3) (common fibular)
    - sensory, test leg and sole of feet
    - motor muscles to back of thigh, leg foot
  2. pudendal (S2-4)
    - supplies most of skin and muscles of perinium, and external anal sphincter
40
Q

what does the sciatic nerve consist of?

A

tibial nerve

common fibular

41
Q

what happens when the tibial nerve is damaged ?

A

paralyzes the calf muscles, cannot plantar flex the foot , shuffling gait

42
Q

where is tibial nerve found at and what is its function?

A

L4,L5 and S1,2,3

Longest nerve in the body

Sensory: to posterior surface of leg and sole of foot
Motor: muscles to the back of leg (hamstrings)

43
Q

what is the Common fibular nerve ? where is it found at and what is its function?

A

sacral plexus L4,5 and S1,2

Sensory: anterior and lateral surface of the leg and dorsum of the foot
Motor : bicep femoris

44
Q

what are dermatome?

A

an area of skin in which sensory nerves derive from a single spinal nerve root
(C1 has no dermatome)
dermatome overlap so destruction of a single spinal nerve will not cause complete numbness

45
Q

what is the function of dermatome?

A

Helpful in evaluating and diagnosing conditions affecting the spine or nerve roots.
Experiencing symptoms along a specific dermatome can help inform doctors about which area of the spine may be affected.

46
Q

what is the lowest dermatome?

A

anterior trunk is T12

posterior trunk L5

vanessa peripheral nervous system (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions