Muscles of The Upper Limb Flashcards

1
Q

muscle groups in the upper limb

A
  1. Muscles connecting Upper Limb with Thoracic wall (muscles of pectoral region)
  2. Muscles connecting Upper Limb with Vertebral column ((back muscles*)
  3. Muscles connecting Scapula with humerus (muscles of the shoulder region)
  4. Muscles of The arm (Anterior & Posterior)
  5. Muscles of The Forearm (Anterior & Posterior)
  6. Muscles of The Hand
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Muscles of the pectoral region

A
  1. Pectoralis Major
  2. Pectoralis Minor
  3. Serratus Anterior
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Pectoralis Major origin and insertion

A

origin:
clavicular head (anterior border of medial ⅔ of clavicle)
sternocostal head (Anterior surface of sternum, The upper 6 costal cartilages)
insertion: Lateral lip of the bicipital groove

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

pectoralis major nerve supply

A

medial and lateral pectoral nerves

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

pectoralis major actions

A
  1. adduction and medial rotation of the arm
  2. flexion of the arm
  3. The sternocostal head, with the arm raised and fixed, can raise the trunk as in climbing
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

**All Muscles Attached to Bicipital groove*

A

Adduct and Medially rotate the arm

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

Pectoralis Minor Origin and insertion

A

Origin: from outer surfaces of 3rd, 4tg and 5th ribs close to their costal cartilages
Insertion: Coracoid process of the scapula

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

Pectoralis minor nerve supply

A

medial pectoral nerve

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

Pectoralis Minor action

A
  1. Protraction of the scapula
  2. Depression of the shoulder
  3. If the scapula is fixed, it elevates the ribs
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Serratus Anterior Origin and Insertion

A

Origin: the side of the chest from the upper 8 ribs (6?)
insertion: the entire length of the anterior aspect of the medial border of the scapula

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

Serratus Anterior nerve supply

A

nerve to surratus anterior (long thoracic nerve)

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

Action of Serratus Anterior

A
  1. Protraction of the scapula
  2. rotation of the scapula upward during raising the arn above the head
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Serratus Anterior Paralysis

A

also known as winging of the scapula

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

what are the muscles connecting the upper limb with vertebral column

A

trapezius and the latissimus dorsi

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

trapezius nerve supply and action

A

nerve supply: Spinal accessory nerve
action: elevates the shoulder

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

latissimus dorsi nerve supply and actions

A

nerve supply: thoracodorsal nerve
actions:
1. adduction and medial rotation
2. extension of the arm
(swimming)

17
Q

what muscles connect the scapula with humerus

A

muscles of the shoulder:
deltoid
supraspinatus
subscapularis

18
Q

deltoid nerve supply and actions

A

nerve supply: axillary nerve
action: middle fibers Abductor of the arm (15⁰ -90⁰)

19
Q

symptoms of deltoid muscle paralysis

A

atrophy of the shoulder
unable to abduct the arm to 90⁰

20
Q

supraspinatus nerve supply and actions

A

nerve supply: suprascapular nerve
action: initiates abduction of the arm (from 0-15⁰)

21
Q

subscapularis nerve supply and actions

A

nerve supply: upper amd lower subscapulaf nerves
action: adduction and medial rotation of the arm

22
Q

muscles of the arm

A

front: (bbc)
1. corachobrachialis
2. Biceps Brachii
3. Brachialis
they are all supplied by Musculotaneous nerve and they are flexors
Back:
Triceps
Its supplied by radial nerve, and it is an extensor

23
Q

coracobrachialis nerve supply and action

A

nerve supply: musculocutaneous nerve
action: flexion of the arm

24
Q

biceps brachii has 2 heads (?)

A

short (medial) head
long (lateral) head [with the capsule of the shoulder joint]

25
Q

nerve supply and actions of biceps brachii

A

nerve supply: musculocutaneous nerve
actions:
1. Flexion of the arm
2. Flexion of the elbow
3. Supinator of the semi-flexed forearm

26
Q

Brachialis nerve supply and action

A

nerve supply: musculocutaneous nerve (its lateral fibers are supplied by the radial nerve)
action: main flexor of the forearm

27
Q

the Triceps brachii has 3 heads (?)

A

long, lateral and medial heads

28
Q

triceps brachii nerve supply and action

A

nerve supply: radial nerve
action: main extensor of the forearm