Anatomy - Elbow Joint Flashcards Preview

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Flashcards in Anatomy - Elbow Joint Deck (16)
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1
Q

Elbow joint

A
  • 4 articular surfaces
  • 3 bones
  • 4 ligaments
  • hinge joint (humeroradial joint + humeroulna)
  • pivot joint (proximal radioulnar)

Capitulum of humerus + head of radius
Trochlea of humerus + trochlea notch of ulna

2
Q

3 Bones

A

Humerus
Radius (lateral)
Ulna (medial)

3
Q

4 Ligaments

A
  1. Joint capsule
  2. MCL (3 bands)
    - anterior band (medial humeral epicondyle to medial coronoid process of ulna)
    - posterior band (medial humeral epicondyle to olecranon)
    - transverse band (connecting two bands on ulnar)
  3. LCL (tip of lateral humeral epicondyle to annular ligament)
  4. Annular ligament (radial head)
4
Q

8 Muscles attachment at lateral humeral epicondyle

A

Extensors of elbow joint

  1. Supinator
  2. ECRB
  3. ECRL
  4. EDM
  5. ECU
  6. ED
  7. Brachioradialis
  8. Anconeus

++along lateral shaft
APL
EPL
EI

5
Q

5 Muscles attachment at medial humeral epicondyle

A

Flexors
Posteriorly
1. FDS
2. FCU

Anteriorly

  1. FCR
  2. PL
  3. PT
6
Q

Capsular attachment

A

Anteriorly: Margin of radial fossa and coronoid fossa of humerus + Margin of coronoid fossa of ulnar + Annular ligament of radius

Posteriorly: Margin of olecranon fossa of humerus + olceranon process of ulna + annular ligament of radius

7
Q

Movement of the elbow joint

A
  1. Flexion

2. Extension

7
Q

4 flexors of elbow joint

A
  1. Brachialis
  2. Biceps brachii
  3. Brachioradialis
  4. Pronator teres
8
Q

2 extensors of elbow joint

A
  1. Triceps

2. Anconeus

9
Q

Angle between long axis of arm and forearm on full extension?

A

“Known as carrying angle”

  • 170 degree in male
  • 167 degree in female

*angle dissapears in full flexion

10
Q

Structures passes anterior to elbow joint

A

2 tendons
1 nerve
1 artery

brachialis
biceps brachii
median nerve
brachial artery

11
Q

Structures passes posterior to elbow joint

A

Triceps tendon

12
Q

Structures passes medial to elbow joint

A

Ulnar nerve

13
Q

Structures passes lateral to elbow joint

A
  1. Common extensors tendon

2. Supinator

14
Q

Muscles attachment at medial proximal ulna

A
  1. FDP
15
Q

Isosceles triangle formed by _____ during elbow flexion

A
  1. Medial humeral epicondyle
  2. Lateral humeral epicondyle
  3. Olecranon prominence

*all these three points become in-line on elbow extension