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Arm & Elbow
Musculature and Structure
25
Anatomy
Graduate
02/17/2012

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Cards

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
Epicondyle function
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
Muscles of elbow flexion
Definition
biceps, brachialis, brachioradialis
Term
Muscles of elbow extension
Definition
triceps, anconeus
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
biceps, supinator
Term
radioulnar joint pronators
Definition
pronator teres, pronator quadratus
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