W8 The Shoulder Flashcards
Clavicle
bony attachment between upper limb and trunk
Consequence of limb having one bony attachment
upper limb is highly mobile
Nerve supply of upper limb
arises from neck, from cervical segments, C5, C6, C7, C8 and thoracic segment T1
Nerve roots of upper limb
form plexus in armpit (axilla)
Axilla
armpit
Blood supply of upper limb
Subclavian artery
Subclavian artery name changes
axillary artery then brachial artery
Nerve supply of trazepius
11th cranial nerve
Trapezius function
elevates, rotates and retracts the scapula
Trapezius
broad flat triangular muscle
Latissimus Dorsi function
extend, abducts and medially rotates the upper limb
Latissimus Dorsi insertion
inserts onto the humerus
Rhomboid major function
retracts and rotates the scapula
Rhomboid minor function
retracts and rotates the scapula
Rhomboid minor attachment
attaches to the medial border of the scapula
Supraspinatus function
abducts the arm, assists deltoid
Infraspinatus function
laterally rotates the arm
Infraspinatus attachment
attaches to greater tubercle of humerus
Teres major attachment
insert anteriorly onto humerus
Teres major function
abducts at the shoulder, and medially rotates the arm
Teres minor function
laterally rotates the arm
Teres minor origination
originates from posterior surface of the scapula
Serratus anterior function
pulls scapula forwards
Serratus anterior attachments
arises from medial border of the scapula - attaches onto ribs
Subscapularis function
rotates head of humerus medially
Musculo-cutaneous innervation
innervates coracobrachialis, biceps brachii and brachialis
Radial nerve innervation
innervates posterior part of upper limb
Axillary nerve
motor and sensory innervation
Axillary nerve motor innervation
innervate deltoid
Median nerve
main nerve in front of forearm
Median nerve controls …
coarse movements of hand
Ulnar nerve innervation
innervates flexor muscles of the hand
Axillary artery
carries oxygenated blood to thorax, upper limb and axilla
