Axilla/Shoulder joint/dorsal scapular space Flashcards
The contents of the axilla are covered by the:
AXILLARY FASCIA
The axilla is bounded by 3 bones:
Anterior: Clavicle
Posterior: scapula
Medial: 1st rib
Refers to the lateral prolongation of the prevertebral fascia which extends up to the elbow and covers the contents of the axilla.
AXILLARY FASCIA
The rotator cuff muscles (SITS)
S supraspinatus
I infraspinatus
T teres MINOR
S subcsapularis
What will STABILIZE THE SHOULDER JOINT?
Tendons of the rotator cuff muscles
Weakest part of the shoulder joint & prone to dislocation?
INFERIOR
6 INTRINSIC MUSCLES OF THE SHOULDER
Supraspinatus Infraspinatus Teres minor Subscapularis Deltoid Teres major
2 shoulder abductor
Supraspinatus
Deltoid
Main abductor of the shoulder
Deltoid
2 lateral rotator
Infraspinatus
Teres minor
2 medial rotator of the shoulder
Subscapularis
Teres major
Nerve Supply: Supraspinatus
SUPRASCAPULAR
Nerve supply: Teres minor
Axillary
Nerve supply: Deltoid
AXILLARY
Nerve supply: teres major
Lower subcsapular
Nerve supply: subscapularis
Upper subscapular
Most commonly affected: inflammation of the rotator cuff
Tendon of the supraspinatus muscle
Pain ANTERIOR & SUPERIOR to the shoulder joint during ABDUCTION means:
Tendons of the rotator cuff may be torn or inflamed.
PBQ: 2 muscles supplied by the AXILLARY NERVE
Teres minor
Deltoid
PBQ: injury to the AXILLARY NERVE, patient will have difficulty with 2 actions:
LATERAL ROTATION (Teres minor) ABDUCTION. ( Deltoid)
PBQ: tendon most commonly affected when torn or inflamed in the rotator cuff?
SUPRASPINATUS TENDON
PBQ: injury to the shoulder joint dislocation, suspect what nerve is most commonly injured?
AXILLARY NERVE
REM: Px has injury to the axillary nerve, how to test for the integrity of the axillary nerve?
Ask patient to ABDUCT AND LATERALLY ROTATE THE SHOULDER
What are the 2 DORSAL SCAPULAR SPACES
- Quadrangular or Quadrilateral Space
2. Triangular Space
Boundary of the QUADRANGULAR/QUADRILATERAL SPACE
ABOVE?
Teres minor
Boundary of the QUADRANGULAR/QUADRILATERAL SPACE
BELOW?
Teres major
Boundary of the QUADRANGULAR/QUADRILATERAL SPACE
Medially?
LONG HEAD OF THE BICEPS BRACHII
Boundary of the QUADRANGULAR/QUADRILATERAL SPACE
Laterally?
Surgical neck of the humerus
The Contentsof the QUADRANGULAR/QUADRILATERAL SPACE
Axillary nerve (also called: circumflex nerve) POSTERIOR CIRCUMFLEX HUMERAL VESSELS
The Contents of the TRIANGULAR SPACE
Circumflex scapular vessels
The Contents of the TRIANGULAR SPACE
ABOVE?
Teres minor
The Contents of the TRIANGULAR SPACE
BELOW?
Teres major
The Contents of the TRIANGULAR SPACE
Laterally?
Long head of the biceps brachii
The Long head of the biceps brachii in the QUADRANGULAR SPACE is located?
MEDIALLY
The Long head of the biceps brachii in the TRIANGULAR SPACE is located?
LATERALLY
