Back and Shoulder Superficial Flashcards
Bones of Pectoral Girdle
Clavicle and Scapula
- incomplete boney ring
Pectoral girdle purpose
attachment + support upper limb
Horseshoe of the pectoral girdle
spine of the scapula
acromian
clavicle
(seen from superior view)
Important muscles attached to pectoral girdle
Trapezius (insertion)
- lat. 1/3 of clavicle
- acromion
- spine of the scapula
Deltiod (Origin)
- lat. 1/3 of clavicle
- acromion
- spine of the scapula
** SAME
Scapula Landmarks
Anterior:
Coracoid process
Subscapular Fossa
Suprascupular notch
Posterior: Acromion Spine of the scapula Supraspinous fossa infraspinous fossa
Lateral View: Glenoid cavity of the scapula supraglenoid tubercle infraglenoid tubercle spinoglenoid notch
Ligament that travels through suprascapular notch
suprascapular ligament
Humerus landmarks
Anterior: Greater tubercle Lesser tubercle Intertubercular Groove Deltiod tuberosity
Surround the head of the humerus
anatomical neck of the humerus
Surrounds the head of the humerus and the greater/lesser tubercles
surgical neck of the humerus (commonly broken)
Posterior Axioappendicular (Thoracoappendicular) Muscles
Superficial (extrinsic shoulder):
- Trapezius
- Latissimus Dorsi
Deep (extrinsic shoulder):
Levator scapula
rhomboid minor + major
Trapezius origin + insertion
Origin:
base of skull
Nuchal ligament
spinous process (C7-T12)
Insertion:
Lat. 1/3 of clavicle
acromion
spine of the scapula
Trapezius action
elevation, retraction and depression of the scapula
- work together: upward rotation of the scapula (glenoid fossa)
Trapezius Innervation
spinal accessory nerve
Latissimus Dorsi origin
Spinous process of lower thoracic vert.
Thoracolumbar fascia
Iliac crest (+ lumbar vert)
Latissimus Dorsi insertion
floor of the inter tubercular groove of the humerus
Latissimus Dorsi action
Extension of humerus at shoulder joint
adduction of humerus
medial rotation of humerus
Latissimus Dorsi innervation
thoracodorsal nerve
Levator scapulae origin
Transverse processes c 1-4
Levator scapulae insertion
Medial border of scapula at level ABOVE the spine
Levator scapulae action
elevation of scapula
rotation of scapula - glenoid fossa down
Levator scapulae innervation
dorsal scapular nerve
nerve also innervates rhomboids
Rhomboid Minor origin
Spinous processes C7-T1