Term
| The ______ and the ______ divide the arm into anterior and posterior compartments |
|
Definition
a) intermuscular septum
b) humerus |
|
|
Term
| Posterior compartment muscles, function, innervation, and arterial supply |
|
Definition
3 heads of the triceps brachii extensors
radial nerve
deep brachial artery |
|
|
Term
| Anterior compartment muscles, function, innervation, and arterial supply |
|
Definition
biceps brachii, brachialis, and coracobrachialis
flexors
musculocutaneous nerve
brachial artery |
|
|
Term
| Triceps brachii long head attachments, action, and innervation |
|
Definition
P: infraglenoid tubercle
D: olecranon
A: power assist for elbow extension and extends and adducts the arm
I: radial nerve |
|
|
Term
| Triceps brachii lateral head attachments, action, and innervation |
|
Definition
P: posterior surface of humerus- superior to radial groove
D: olecranon
A: elbow extension
I: radial nerve |
|
|
Term
| Triceps brachii medial head attachments, action, and innervation |
|
Definition
| P: posterior surface of humerus- inferior to radial groove D: olecranon A: primary extensor, active throughout elbow extension I: radial nerve |
|
|
Term
| Biceps brachii attachments, action, innervation |
|
Definition
P: long head- supraglenoid tubercle
P: short head- corocoid process
D: tuberosity of the radius
A: primary forearm supinator, power assist for elbow flexion
A: musculocutaneous nerve |
|
|
Term
| Brachialis attachments, action, innervation |
|
Definition
P: anterior surface of humerus
D: coronoid process and tuberosity of the ulna
A: primary elbow flexor, active throughout elbow flexion
I: musculocutaneous nerve |
|
|
Term
| Coracobrachialis attachments, action, innervation |
|
Definition
P: corocoid process of scapula
D: mid way along the medial humerus
A: action at the GH joint for flexion and adduction
I: musculocutaneous nerve |
|
|
Term
|
Definition
| provide a mechanical advantage to the forearm muscle groups that attach at these sites |
|
|
Term
| In full flexion, the rim of the radial head slides in the ________ and enters the _______ |
|
Definition
a) capitulotrochlear groove
b) radial fossa |
|
|
Term
| Carrying angle is formed by what? |
|
Definition
| the vertical axis of the humerus and the vertical axis of the forearm |
|
|
Term
| Carrying angle is due to what? |
|
Definition
| the configuration of the bony articulating surfaces |
|
|
Term
| Carrying angle of males? females? |
|
Definition
male: 5 degrees
female: 10-15 degrees |
|
|
Term
| The "elbow joint" includes what two anatomical joints? |
|
Definition
| humeroulnar and humeroradial joints |
|
|
Term
|
Definition
| biceps, brachialis, brachioradialis |
|
|
Term
| Muscles of elbow extension |
|
Definition
|
|
Term
| Collateral ligaments of the elbow function |
|
Definition
| increase stability and joint apposition |
|
|
Term
| Collateral ligaments of the elbow |
|
Definition
Ulnar collateral ("MCL")
Radial collateral ("LCL")
Annular ligament |
|
|
Term
| Fibers of the ______ attach to the annular ligament |
|
Definition
| radial collateral ligament |
|
|
Term
| Annular ligament function |
|
Definition
-acts like a sling holding the radial head close to the ulna bone
-offers support but allows rotation (spin) as well as glide of the radial head during supination/pronation |
|
|
Term
| Radioulnar joint is a complex joint with ____ articulations connected by ________ |
|
Definition
| two, interosseous membrane |
|
|
Term
| Radioulnar joint action at the forearm and location |
|
Definition
supination, pronation
inferior- with capsule and disc |
|
|
Term
| Radioulnar joint supinators |
|
Definition
|
|
Term
| radioulnar joint pronators |
|
Definition
| pronator teres, pronator quadratus |
|
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