Unit 3 Arm Flashcards
1
Q
Humerus Head Articulation
A
- Glenohumeral joint
2
Q
Humerus Necks
A
- Anatomical
- Surgical
3
Q
Anatomical Neck
A
- Epiphyseal plate of long bone
4
Q
Common Break Site
A
- Surgical neck
5
Q
Humerus Shaft Components
A
- Greater & lesser tubercle
- Intertubercular sulcus
6
Q
Elbow Articulation
A
- Capitulum
- Trochlea
7
Q
Flexor/Anterior Compartment
A
- Innervated by musculocutaneous
8
Q
Extensor/Posterior Compartment
A
- Innervated by radial
9
Q
Arm Flexor Muscles
A
- Biceps brachii
- Coracobrachialis
- Brachialis
10
Q
Flexor Muscle Innervation
A
- Shoulder
- Elbow
11
Q
Biceps Brachii Attachment
A
- Distal to elbow
- Tendon attaches to radius
- Aponeurosis attaches to ulnar
12
Q
Biceps Brachii Function
A
- Pronation
13
Q
Aponeurosis Function
A
- Weak flexion of forearm
- Flexion of elbow
- Protect cubital fossa
14
Q
Coracobrachialis
A
- Shoulder flexor
15
Q
Brachialis
A
- Elbow flexor
16
Q
Musculocutaneous Innervation
A
- Biceps
- Coracobrachialis
- Brachialis
17
Q
Radial Innervation
A
- Brachialis
18
Q
Rupture of Bicep (Long Head)
A
- Tendon torn/avulsed
- Pulled off supraglenoid tubule (glenohumeral joint)
- Not surgical
- Muscle will atrophy
19
Q
Musculocutaneous Nerve Pathway
A
- Anterior to humerus
- Pierces coracobrachialis
20
Q
Musculocutaneous Injury Function Implications
A
- Loss of shoulder flexion
- Loss of forearm supination
- Loss of elbow flexion
21
Q
Extensor/Posterior Muscles
A
- Triceps (long, medial, lateral heads)
22
Q
Long Head of Triceps Function
A
- Arm extension
- Crosses shoulder joint
23
Q
All Tricep Heads Function
A
- Forearm Extension
24
Q
Radial Nerve Innervation
A
- All tricep heads
25
Humeral Shaft Fracture Young People
- High energy trauma
26
Humeral Shaft Fracture Old People
- Osteopenia
27
Humeral Shaft Fracture Risks
- Radial nerve at radial groove
- Radial nerve palsy
- Reduced risk extension
- Radial deviation
- Reduced elbow flexion
28
Radial Nerve Pathway
- Posterior to humerus
- Under lateral head of triceps
- Along radial groove
29
Axilla Boarders
- Anteriorly pectoralis major & minor
- Medially, serratus anterior & thoracic
- Posteriorly, subscapularis, teres minor & latissimus dorsi
- Laterally, intertubercular sulcus