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musculoeskelatal > Arm And Cubital Fossa > Flashcards

Arm And Cubital Fossa Flashcards

1
Q

Arm Joints

A

Proximal: Glenohumeral Joint
Distal: Humeroulnar and Humeroradial

Proximal Radio-Ulnar

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2
Q

Which bones make up the Glenohumeral joint?

A

Scapula + Humerus

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3
Q

Elbow joints responsible for flexión and extension

A

Humeroulnar + Humeroradial

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4
Q

Elbow joint responsible for supination and pronation

A

Proximal radio-ulnar joint

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5
Q

Attachment and components of Glenohumeral joint

A

Attaches from supraglenoid tubercle to lesser tubercle of the humerus.

Has an superior, middle and inferior thickening

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6
Q

Attachment and components of transverse humeral ligament

A

Spans the greater and lesser tubercle of the humerus.

Holds the long head of the bicep tendon.

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7
Q

What are the components of the ulnar collateral ligament and where does it attach?

A

Attaches from medial epicondyle of the humerus to coronoid process and olecranon of ulna.

Has an anterior, posterior and oblique band.

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8
Q

What are the components of the radial collateral ligament and where does it attach?

A

Attaches from lateral epicondyle of humerus to radial notch and angular ligament.

Weaker than ulnar collateral ligament but provides posterolateral stability.

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9
Q

What are the components of the angular ligament and where does it attach?

A

It surrounds the radial head and radial notch of the ulna.

Keeps the radial head in the radial notch; allows pronation and supination.

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10
Q

In what two compartments is the arm divided?

A

It is divided into anterior (flexor) and posterior (extensor) by the intermuscular septum

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11
Q

What nerve and blood vessel supplies the posterior compartment of the arm?

A

Radial nerve + profunda brachii artery

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12
Q

Supplies blood and innervation to flexor compartment of the arm

A

Brachial artery and musculocuteaneous nerve

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13
Q

Muscles of of anterior compartment of the arm

A

Biceps brachii
Brachialis
Coracobrachialis

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14
Q

Muscles of of extensor compartment of the arm

A

Triceps brachii

Anconeus

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15
Q

Origin of biceps brachii

A

Short head: apex of coracoid process of scapula

Long head: supraglenoid tubercle of the scapula

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16
Q

Insertion of biceps brachii

A

Radial tuberosity

17
Q

Attachments of Brachialis

A

Proximal: middle anterior surface of humerus
Distal: coronoid process and tuberosity of ulna

18
Q

Attachments of Coracobrachialis

A

Proximal: tip of the coracoid process of the scapula
Distal: middle medial surface of humerus

19
Q

Biceps brachii function

A

Flexes forearm at elbow; flexes supinated forearm

20
Q

Brachioradialis main action

A

Flexes forearm at elbow in any position

21
Q

Coracobrachialis function

A

Helps flex and abduct arm at shoulder

22
Q

Proximal attachment of triceps brachii

A

Long head: infraglenoid tubercle of scapula

Medial and lateral heads: posterior surface of humerus

23
Q

Distal attachment of triceps brachii

A

Posterior surface of olecranon of ulna

24
Q

Main actions of triceps brachii

A

Main extensor of the the elbow; steadies the head of abducted humerus

25
Q

Main actions of anconeus

A

Assists triceps in extension; abducts ulna during pronation

26
Q

Aconeus attachments

A

Proximal: lateral epicondyle of humerus

Distal: lateral surface of olecranon and superior part of posterior surface of ulna

27
Q

Two articular parts of the condyle

A
  1. Capitulum: articulates with radius

2. Throchlea: articulates with ulna

28
Q

Brachial artery (4 characteristics)

A

Continuation of axillary artery

Divides into radial and ulnar arteries

In proximal arm: lies on medial side

In distal arm: lies on lateral side

29
Q

Median nerve (3 characteristics)

A

Passes down medial side of the arm

Proximal region: lateral to brachial artery
Distal region: medial to brachial artery

30
Q

Ulnar nerve (trajectory)

A

Enters arm with median nerve and axillary artery, passing medial to the artery.

Passes posterior to medial epicondyle of humerus and then to anterior compartment of the forearm.

31
Q

What is the cubital fossa?

A

Triangular depression between brachioradialis and pronator teres.

musculoeskelatal (6 decks)

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