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CPPS 221 > upper limb muscles > Flashcards

upper limb muscles Flashcards

1
Q

sternocleidomastoid (SCM)

A

O:
- clavicular head: sternal end of clavicle
-Sternal head: manubrium

I: mastoid region of skull and lateral portion of superior nuchal line

A:
-together: felt the neck
-Individually: laterally flex/rotate head to opposite side

Innervation: accessory (cranial nn XI)

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1
Q

Strap muscles (infra hyoids) (action only)

A
  1. Sternohyoid
  2. Thyrohyoid
  3. Sternothyroid
  4. omohyoid

action: depress the hyoid

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2
Q

Suprahyoid Muscles (action only)

A
  1. Diagastric (ant./post. belly)
  2. Mylohyoid
  3. Geniohyoid
    5.Stylohyoid
    (anterior neck)

Action: all elevate hyoid and depress mandible

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3
Q

Trapezius

A

O: occipital bone, ligament nuchae, spinous process of the T spine vertebrae
I: clavicle and scapula (acromion and scapular spine)
A: elevate, retract, depress rotate scapula upwards
Innervation: Accessory nerve

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4
Q

Scalene muscles (action only)

A

Posterior
Middle
Anterior

Action:
-Together: flexion
-Alone: lateral flexion, rib elevation
-Rotation: Ant. scalene; rotate opposite side
- Mid+Post; same side rotation

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5
Q

Latissimus Dorsi

A

O: spinous process of inferior thoracic and all lumbar/sacral vertebrae, ribs 8-12 and thoracolumbar fascia

I: Floor of inter tubercular sulcus of humerus

A: extends, adducts, med. rotates shoulder

N: thoracodorsal nerve

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6
Q

Levator scapula

A

O: Transverse process of first four C spine vertebrae

I: Vertebral border of scapula near superior angle and medial end of scapular spine

A: elevates scapula

N: cervical C3-C4 and dorsal scapular nerve

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7
Q

Rhomboid Major

A

O: ligamentum nuchae and SP of T2-T5

I: vertebral border of scapula from spine to inferior angle

A: adducts and performs downward rotation of scapula

N: Dorsal scapular nerve

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8
Q

Rhomboid Minor

A

O: SP of vertebrae C7-T1

I: vertebral border of scapula

A: adducts and downward rotation

N: dorsal scapular nerve

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9
Q

erector spinae (intermediate layer) (I love spaghetti)

A

iliocostalis
longissimus
spinalis

Action: together extension of back
Unilateral- neck lateral flexion, lateral flexion of spine

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10
Q

deep layer of posterior trunk (action only)

A

-multifidus
-rotatores
-interspinalis
-semispinalis
-intertransversarii- lateral flexion

Action: all extend vertebral column
rotatores, semispinalis, and multifidus also rotate to the opposite side

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11
Q

external oblique

A

O: external and inferior borders of ribs 5-12
-fibres run anterior and inferior

I: external oblique aponeurosis extending to iliac crest and linea alba

A: compresses, rotates opposite side

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12
Q

Internal oblique

A

O: thoracolumbar fascia, inguinal ligament and iliac crest
-fibres run anterior superior

I: inferior surfaces of ribs 9-12, costal cartilages 8-10, linea alba and pubis

A: compresses, rotates to same side

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13
Q

transverse abdominis

A

deep layer and compresses abdomen

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14
Q

rectus abdominis

A

O: superior surface of pubis around symphysis

I: inferior surfaces of cartilages ribs 5-7 and diploid of sternum

A: flexion of vertebral column, compression and depress ribs

N: intercostal nerve

-riight and left side superheated by linea alba
-contained within rectus sheath

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15
Q

intercostals (external, internal)

A

external- elevate ribs
internal- depress ribs

transverse thoracis- depress ribs

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16
Q

Diaphragm

A

innervated by phrenic nerve
C3, 4 and 5 keep me alive

contracts during inhalation- expands thoracic cavity

17
Q

biceps brachii

A

O:
-short head: coracoid process
-Long head: supragelnoid tubercle on scapula

I: radial tuberosity

A: flexion at elbow and shoulder, supination of forearm and hand

N: musculocutaneous nerve C5-C6

18
Q

Brachialis

A

O: distal half of anterior surface of humerus

I: Ulnar tuberosity and coronoid process

A: flexion at elbow

N: musculocutaneous C5-C6 and radial C7-C8

19
Q

Brachioradialis

A

O: lateral supercondylar ridge of humerus (superior to lateral epicondyle)

I: lateral aspect of styloid process of radius

A: flexion at elbow

N: radial nerve C6-C8

20
Q

Triceps Brachii

A

O:
-lateral head: superior lateral margin of humerus
-medial head: posterior surface inferior to radial groove
-Long head: infraglenoid tubercle of the scapula

I: olecranon process of ulna

A: extension of elbow
Long head also shoulder extension and adduction

N: radial C6-C8

21
Q

Aconeus

A

O: posterior surface of lateral epicondyle of humerus

I: lateral margin of olecranon and ulnar shaft

A: extension of elbow

N: radial nerve C6-C8

22
Q

Flexor Carpi radials

A

O: medial epicondyle of humerus

I: bases of second and third metacarpal

A: flexion and abduction

N: median nerve C6-C7

23
Q

Flexor Carpi Ulnaris

A

O: medial epicondyle and anteromedial portion of ulna

I: pisiform, hamate, and base of fifth metacarpal

A: flexion and adduction of wrist

N: ulnar C8-T1

24
Q

Palmaris Longus

A

O: medial epicondyle of humerus

I: palmar aponeurosis and flexor retinaculum

A: flexion of wrist

N: median nerve C6-C7

25
Q

Digital Flexors (anterior compartment)
flexor digitorum profundus
(action)

A

flexion of wrist, DIP and PIP

25
Q

Digital Flexors (anterior compartment)
flexor digitorum superficialis
(action)

A

flexion of wrist
MCP
PIP

26
Q

Digital Flexors (anterior compartment)
flexor pollicis longus
(action)

A

flexion of thumb

27
Q

Extensor Carpi Radialis Longus

A

O: lateral supracondylar ridge of humerus

I: base of second metacarpal bone

A: extension and abduction at wrist

N: radial nerve C6-C7

28
Q

Extensor Carpi Radialis Brevis

A

O: lateral epicondyle of humerus

I: base of third metacarpal

A: extension and abduction at wrist

N: radial nerve C6-C7

29
Q

Extensor Carpi Ulnaris

A

O: lateral epicondyle of humerus, dorsal surface of ulna

I: base of fifth metacarpal bone

A: extension and adduction at the wrist

N: deep radial nerve C6-C8

30
Q

extensor digitorum (action)

A

extension of fingers and wrist

31
Q

extensor pollicis longus (action)

A

extension at joints of thumb, abduction at wrist

32
Q

extensor pollicis brevis (action)

A

extension at joints of thumb, abduction at wrist

33
Q

extensor digiti minimi (action)

A

extension at joints of little finger, extension of wrist

34
Q

abductor pollicis longus (action)

A

abduction at joints of thumb and wrist

35
Q

extensor indicis (action)

A

extension and adduction at joints of index finger

36
Q

pronator teres (long and thread like)

A

O: medial epicondyle of humerus and coronoid process of ulna

I: middle or lateral surface of radius

A: pronate forearm and hand

N: median nerve C6-C7

37
Q

Pronator quadratus (wrist watch)

A

O: anterior and medial surface of distal ulna

I: anterolateral surface of distal portion of radius

A: pronation (medial rotation of radius)

N: median nerve C8-T1

38
Q

supinator

A

O: lateral epicondyle of humerus and ridge near radial notch of ulna

I: anterolateral surface of radius distal to the radial tuberosity

A: supinates forearm

N: deep radial nerve C6-C8

CPPS 221 (16 decks)

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