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Anatomy MSK > Forarm > Flashcards

Forarm Flashcards

1
Q

Elbow joint type

A

Hinge

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2
Q

Elbow joint articulations share common ———-

A

Synovial cavity

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3
Q

Function of the fat pads

A
  • accommodate bony processes during extension and flexion of the elbow
  • prevent friction
  • provide cushioning
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4
Q

Head of the radius for communication with

A

Capitulum

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5
Q

Ligaments of the elbow joint

A
  • radial collateral lig(lateral)
  • ulnar collateral lig(medial)
  • anular lig of radius
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6
Q

-radial collateral lig(lateral)
-ulnar collateral lig(medial)
Function

A

Prevent addiction and abduction so u can only flex and extend the elbow joint

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7
Q

Function of anular lig

A

Allow the radial head to slide against the radial notch of ulna during pronation and supination

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8
Q

When the radial collateral lig (lateral) is damaged

A

Tennis elbow

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9
Q

Tennis’s elbow

A

Inflammation/tear in the collateral radial lig result from excessive pulling of that lig

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10
Q

Tennis elbow sports

A

Tennis and baseball

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11
Q

Proximal radioulnar joint type

A

Pivot joint of synovial joint

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12
Q

Proximal radioulnar joint articulation

A

Head of the radius articulate with the radial notch of ulna

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13
Q

Proximal radioulnar joint movement

A

During supination and pronation of the forearm the head of the radius rotates within the ring formed by anular lig and radial notch of ulna

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14
Q

Dislocation of radial head occur in

A

Children under 5years

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15
Q

How the dislocation of radial head happened ?

A

Not yet developed head of the radius can easily slip out the annular lig

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16
Q

Distal radioulnar joint type

A

Pivot type of synovial joint

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17
Q

Articulation of the distal radioulnar joint

A

Head of the ulna articulate with the ulnar notch of the radius

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18
Q

Articular disc in the distal radioulnar joint

A

Afibrocartilaginous articular disc binds the end of the ulna and radius together

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19
Q

What is the role of the articular disc in the distal radioulnar joint

A

Separates the cavity of the distal radioulnar joint from tha cavity of the wrist joint

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20
Q

Distal radioulnar joint movement

A

during pronation and supination of the forearm and hand, the distal end of the
radius moves anteriorly and medially, crossing the ulna anteriorl

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21
Q

Wrist joint type

A

Condyloid type of synovial joint

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22
Q

Articulation of wrist joint

A
  • distal end of the radius
  • articular disc overlying distal end of the ulna
  • proximal row of carpal bone except ***pisiform
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23
Q

Carbal bones involved in the wrist joint

A
  • scaphoid
  • lunate
  • triquetrium
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24
Q

The fibrous capsule surrounds the wrist joint and is attached to the distal —————-
and proximal ————-

A

Distal end of the radius and ulna

Proximal row of carpals.

25
Q

Palmar and dorsal radiocarpal ligaments passes

A

From the radius to the two rows of the carpals

26
Q

What are the movements of the wrist joint?

A

Adduction abduction, Flexion, Extension

27
Q

What limits the abduction of the hand at the rest joint?

A

Styloid process of the radius

28
Q

What are the compartment of the forearm ?

A

1) anterior:flexor pronation compartment

2) posterior:extensor supination compartment

29
Q

All the ant. Muscles supplied by

A

Median nerve with 2exception

1) except flexor carpi ulnaris
2) medial part of flexor digitorum profundus.

30
Q

All post. Muscles are supplied by

A

Radial nerve

31
Q

The flexor muscle of the forearm in the anterior compartment of the forearm are separated from the extensor muscles of the posterior compartment by

A

radius and the ulna
and the interosseous
membrane that connects them.

32
Q

The flexor muscles are arranged in

A

three layers or groups,
superficial,
intermediate
deep.

33
Q

All the flexor muscles of the ant. Compartment are attached at least in part by the

A

common flexor tendon from the medial epicondyle of the

humerus.

34
Q

Superficial muscles of the ant. Compartment

A

1) pronation teres
2) flexor carpi radialis
3) palmaris longus
4) flexor carpi ulnaris
5) flexor digitorum superficialis

35
Q

Middle muscles of the ant. Compartment

A

1) flexor digitorium profundus

2) flexor policies longus

36
Q

Deep muscles of the ant. Compartment

A

Pronation quadratics

37
Q

Muscles cross the elbow joint

A

The 5 superficial muscles

38
Q

Function of the muscles of the superficial anterior compartment

A

1)Flexor carpi radialis
2)flexor carpi ulnaris
3)palmaris longus
All act together to flex the hand at wrist joint

39
Q

Flexor carpi radialis function alone to

A

Abduct the hand

40
Q

flexor carpi ulnaris function alone to

A

Adduct the hand

41
Q

Palmaris longus function alone

A

Absent; useful guide to the median nerve at the wrist joint.

42
Q

FLEXOR DIGITORUM SUPERFICIALIS

Function:

A

Flexes middle phalanges at proximal interphalangeal joints of medial four digits.

43
Q

FLEXOR DIGITORUM PROFUNDUS

Function;

A

Flexes distal phalanges at distal interphalangeal joints of medial four digits.

44
Q

FLEXOR DIGITORUM PROFUNDUS

Nerve supply

A

The lateral part supplied by median nerve and the medial part supplied by ulnar nerve.

45
Q

FLEXOR POLLICIS LONGUS

Function

A
  • flexes the interphalangeal joint of the thumb
  • flexes the metacarpophalangeal and carpometacarpal joint of the thumb
  • flexion of the wrist
46
Q 
PRONATOR TERES (superficial & QUADRATUS(deep)
But share the same function
A

Pronator quadratus is the prime mover in pronation assisted by the pronator teres when more
speed and power are needed.
• The pronator quadratus also helps the interosseous membrane hold the radius and ulna together.

47
Q

The extensor muscle of the forearm can be organized into three functional groups.

A

1) 1ST MUSCLE THAT EXTEND AND ABDUCT OR ADDUCT THE HAND AT THE WRIST JOINT
2) 2nd MUSCLES THAT EXTEND THE MEDIAL FOUR DIGITS
3) 3rd MUSCLES THAT EXTEND OR ABDUCT THE 1ST DIGIT OR THUMB.

48
Q

1ST MUSCLE THAT EXTEND AND ABDUCT OR ADDUCT THE HAND AT THE WRIST JOINT

A

Extensor carpi radialis longus (abduct)
Extensor carpi radialis brevis (abduct)
Extensor carpi ulnaris (adduct)

49
Q

2nd MUSCLES THAT EXTEND THE MEDIAL FOUR DIGITS

A
  • extensor digitorum
  • extensor digiti minimi
  • extensor indicis
50
Q

3rd MUSCLES THAT EXTEND OR ABDUCT THE 1ST DIGIT OR THUMB.

A
  • abductor policies longus
  • extensor pollicis brevis
  • extensor pollicis longus
51
Q

only muscles of the posterior compartment that do

not cross the wrist and therefore are incapable of acting on it.

A

BRACHIORADIALIS

52
Q

BRACHIORADIALIS help in flexion of

A

Elbow joint not wrist joint

53
Q

BRACHIORADIALIS exception of

A

Cc

54
Q

The cubital fossa is a triangular depression formed between two muscles of the forearm?

A

brachioradialis(

& pronator teres).

55
Q

The floor of cubical fossa is formed by—— and roof——

A
  • brachial is

- deep fascia , bicipital aponeurosis and skin

56
Q

What is the clinical importance’s of the cubital fossa?

A

They withdrawal blood from it

57
Q

Arrangement of veins on the cubical fossa

A

It forms communication bt the cephalic and the basilic veins

58
Q

Lateral border of cubical fossa

A

BRACHIORADIALIS

Anatomy MSK (10 decks)

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