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1022 ANATOMY > Week 8 Elbow joint and cubital fossa > Flashcards

Week 8 Elbow joint and cubital fossa Flashcards

1
Q

joint classification of elbow joint

A

compound synovial modified hinge joint

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2
Q

bone and articular surfaces of elbow joint

A

humeroradial (capitulum/ head of radius)
humeroulnar (trochlea/ trochlear notch of ulna)

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3
Q

fibrous capsule of elbow joint

A

encloses 包圍 the proximal radioulnar joint

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4
Q

synovial membrane of elbow joint

A

continuous below with the synovial membrane of the proximal radioulnar joint

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5
Q

ligaments of elbow joint

A

1. medial (ulnar) collateral ligament (MCL)
- anterior band –> strongest, provides valgus and anteroposterior stability
- posterior band
- oblique (transverse) band –> from ulna to ulna

2. lateral (radial) collateral ligamentous complex
- lateral (radial) collateral ligament (LCL) –> deep fibers: lateral ulnar collateral ligament (LUCL)
- annular ligament
–> forms fibro-osseous ring that encircles the head of radius
–> flexibility to let radial head move pronation and supination

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6
Q

special structures of elbow joint

A
  1. olecranon bursa
  2. fat pads in the fossae
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7
Q

nerve supply of elbow joint

A

Hilton’s law - a nerve that supplies muscles producing movement a joint, also supply that joint

  1. radial nerve
  2. ulnar nerve
  3. medial nerve
  4. musculocutaneous nerve
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8
Q

blood artery of elbow joint

A

brachial artery (extensive anastomoses around the elbow)
–> profounda brachii
–> superior and inferior ulnar collateral
–> radial and ulnar

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9
Q

movements of elbow joint

A

flexion/ extension (135/0 degrees)

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10
Q

muscle groups of elbow joint

A

elbow flexors (brachialis, biceps brachii, brachioradialis)

elbow extensors (triceps brachii, anconeus)

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11
Q

joint classification of proximal (superior) radioulnar joint

A

synovial pivot joint

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12
Q

bones and articular surfaces of proximal (superior) radioulnar joint

A
  1. head of radius
  2. radial notch
  3. annular ligament
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13
Q

fibrous capsule of proximal (superior) radioulnar joint

A

encloses the elbow joint

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14
Q

synovial membrane of proximal (superior) radioulnar joint

A

continuous above with synovial membrane of elbow joint

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15
Q

ligaments of proximal (superior) radioulnar joint

A

annular ligament

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16
Q

nerve supply of proximal (superior) radioulnar joint

A
  1. radial (posterior interosseous)
  2. median
  3. musculocutaneous
17
Q

blood supply of proximal (superior) radioulnar joint

A
  1. profounda brachii (middle and radial collateral branches)
  2. radial recurrent (radial)
  3. interosseous recurrent (common interosseous)
18
Q

movements of proximal (superior) radioulnar joint

A

pronation/ supination

19
Q

muscles groups of proximal (superior) radioulnar joint

A

forearm pronators (pronatos teres, pronator quadratus)

forearm supinators (biceps brachii, supinator)

20
Q

proximal and distal attachment of pronator teres

ulnar and humeral head

A

proximal:
ulnar head: coronoid process
humeral head: medial epicondyle of humerus

distal:
middle of convexity of lateral surface of radius

21
Q

innervation of pronator teres

A

median nerve (C6,C7)

22
Q

main action of pronator teres

A

pronates and flexes forarm (at elbow)

23
Q

proximal and distal attachment of pronator quadratus

A

proximal:
distal 1/4 of anterior surface of ulna

distal:
distal 1/4 of anterior surface of radius

24
Q

innervation of pronator quadratus

A

anterior interosseous nerve, from median nerve (C8, T1)

25
Q

main action of pronator quadratus

A

pronates forearm; deep fibers bind radius and ulna together

26
Q

proximal and distal attachment of supinator

A

proximal:
- lateral epicondyle of humerus
- radial collateral and annular ligaments
- spinator fossa
- crest of ulna

distal:
- lateral, posterior, and anterior surfaces of proximal third of radius

27
Q

innervation of supinator

A

deep branch of radial nerve (C7,C8)

28
Q

main action of supinator

A
  • supinates forearm
  • rotates radius to turn palm anterior or superiorly (if elbow is flexed)
29
Q

boundaries of cubital fossa

superiorly, medially, laterally

A

superiorly: an imaginary line connecting the medial and lateral epicondyles of the humerus
medially: pronator teres
laterally: brachioradialis

30
Q

roof of cubital fossa

A
  • skin (and subcutaneous tissue)
  • medial cubital vein
  • bicipital aponeurosis
  • antebrachial fascia
31
Q

floor of cubital fossa

A

brachialis
supinator

32
Q

contents of cubital fossa

A
  • biceps brachii tendon
  • brachial artery (termination) and its
    branches
  • radial and ulnar arteries (commencement) and their branches
  • deep (accompanying) veins
  • median nerve
  • radial nerve (under brachioradialis)

TAN

1022 ANATOMY (10 decks)

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