Arm, Cubital Fossa, Elbow Joint

Front 1

Biceps Brachii m.
A=
NN=

Back 1

long head starts at transverse humeral ligament and short head the coracoid, and they insert into radial tuberosity
A= supinate, flex (after 90), abduct and weakly flex, stabilize shoulder
NN= musculocutaneous

Front 2

Coracobrachialis m.
A=
NN=

Back 2

Starts at coracoid and inserts into medial humerus
A= flex and adduct hum.
NN= musculocutaneous

Front 3

Brachialis m.
A=
NN=

Back 3

starts at humerus shaft and inserts into ulna coronoid process
A= main flexor
NN=musculocutaneous

Front 4

Triceps Brachii m.
A=
NN=

Back 4

long head starts at infraglenoid tubercle of scapula, and med/lat head at humerus shaft, and the insert into olecranon process of ulna
A= extend forearm and resist shoulder dislocation
NN=Radial n.

Front 5

Anconeus m.
A=
NN=

Back 5

Starts at lateral epicondyle of hum and inserts into ulna shaft
A= assist with forearm extension and stabilize elbow
NN= radial n.

Front 6

Where do you place the cuff to check BP? where do you listen for the pulse?

Back 6

Place cuff around mid-arm compressing brachial a. against humerus
Listen to pulse medial to biceps brachii tendon in cubital fossa

Front 7

Cubital fossa Borders:

Back 7

Lateral epicondyle, medial epicondyle, brachioradialis m. and pronator teres m.

Front 8

Cubital fossa Roof and contents:

Back 8

skin, subcutaneous tissue, bicipital aponeurosis, brachial/antebrachial fascia
-Median cubital v.
-lateral and medial cutaneous n. of forearm

Front 9

Cubital fossa "under roof" contents:

Back 9

Biceps brachii tendon, Brachial a. Median n
TAN

Front 10

Cubital fossa "floor"

Back 10

Brachialis m.
supinator m.

Front 11

Where do you check bicipital myotatic reflex?

Back 11

C5-C6
-tap the biceps tendon and the forearm should flex

Front 12

Bicipital aponeurosis protects?

Back 12

brachial artery
median nerve

Front 13

what are the 2 variations in the cubital fossa vascular system?

Back 13

1. 20% the median vein divides into median basilic and cephalic vein
2. 3% of people have higher brachial bifurcation with ulnar or radial artery passing superficial to bicipital aponeurosis

Front 14

ruptured tendon of long head biceps brachii=

Back 14

-tendon torn from proximal attachment site
-rupture may be accompanied by snap/pop
-forceful flexion of arm against heavy resistance
-friction in intertubercle sulcus

Front 15

Humerus shaft fracture

Back 15

-arm shortens (muscles pull sup. and bones overlap)
-risk of damage to radial n and deep a. of arm "radial groove"
-weakness in arm extension + sensory loss
"wrist drop"

Front 16

Elbow joints-Humeroulnar:

Back 16

articulation bw trochlear notch (unla) and trochlea (humerus)

Front 17

Elbow joints- Humeroradial:

Back 17

articulation bw radial head (radius) and capitulum (humerus)

Front 18

Elbow joints-Radio/ulnar:

Back 18

articulation bw radial head (of radius) and radial notch (ulna)
-radial head is secured by anular ligament

Front 19

3 components of elbow joint:

Back 19

1. joint biomechanics (synovial)
2. joint capsule (fibrous and synovial membrane)
3. collateral ligaments (radial and ulnar-ant, post, obliq)

Front 20

Elbow dislocation
mechanism=
types=
nerves injured=

Back 20

-Fall onto extended and abducted arm, hyperextension of elbow, direct blow to elbow
=post (80-90%), lat, med, "terrible triad"
=ulnar and median n.

Front 21

Subluxation and dislocation of the radius:

Back 21

"nursemaid's elbow" or "pulled elbow"
-radial head come out of anular ligament
-painful bc of pinched ligament/nerve