Upper limb origins and insertion Flashcards
Trapezius origin and insertion
origin: superior nuchal line, external occipital protuberance, medial margin of the ligamentum nuchae, spinous process of CVII to TXII and related supraspinaous ligaments
Trapezius innervation
Sensor nerve; cranial nerve XI
Trapezius function
elevates scapula,
rotates scapula during abduction of humerous above horizontal,
middle fibers retract scapula. lower fibers depress scapula
Deltoid origin and insertion
Origin: lateral margin of acromion, spine of scapula; lateral 1/3 of clavical
Insertion: deltoid tuberosity
Deltoid innervation
axillary nerve (C5-C6)
Deltoid action
ABduction, posterior fibers cause extension and anterior fibers flexion
Levator scapulae origin and insertion
origin: Transferse process of C1-C2 and posterior tubercales of transfer process of C3-C4
Insertion: posterior surface of medial border of scapula from superior angle to root of spine of the scapula
Levator scapulae innervation
branches directly from anterior rami C3-C4 and branches from C 5 of dorsal scapular nerve
Levator scapulae action
elevates scapula
Rhomboid minor origin and insertion
Origin: lower end of ligaments nuchael and spinous processes of C7-T1 vertabrae
Insertion: posterior surface of medial border of scapula at the root of the spine of the scapula
Rhomboid minor innervation
dorsal scapular nerve (C4-C5)
Rhomboid minor action
elevates and retracts the scapula
Rhomboid major origin and insertion
origin: spinous process of T2-T5
Insertion: posterior surface of medial border of scapula from the root of the spine of the scapula to the inferior angle
Rhomboid major innervation
dorsal scapular nerve (C4-C5)
Rhomboid major action
elevates and retracts the scapula
Supraspinatus origin and insertion
Origin: medial two thirds of supraspinous fossa
insertion: greater tubercle of humerous
supraspinatus innervation
suprascacular nerve (C5-C6)
infraspinatus origin and insertion
origin: infraspinus fossa of scapula
insertion: greater tubercle of humorous
infraspinatus innervation
suprascpular nerve (c5-c6)
teres minor origin and insertion
origin: lateral border of scapula
insertion: grater tuberacle of humerus
teres minor innervation
axillary nerve (c5-c6)
teres minor action
rotator cuff muscle; lateral rotation of arm at glenohumeral joint
teres major origin and insertion
origin: elongate oval area on the posterir surface of the inferior angle of the scapula
insertion: medial lip of the intertubecular groove on anterior surface of the humerus
teres major innervation
inferior scapular nerve C5-C7
Teres major action
medial rotation and extension of arm at the shoulder joint
long head of triceps origin and insertion
origin: infraglenoid tuberacle of scapula
insertion: common tendon insertion with medial and lateral heads on the olecranon process of ulna
long head of triceps innervation
radial nerve (c6-C8)
triceps action
extension of arm at shoulder and elbow
name the borders and contents of the quadrangular space
borders: inferior margin of teres minor, surgical neck of humerus, superior margin of the teres major, latearl margin of the long head of tricepts brachii
contents: acial nerve and posterior circumflex humeral artery and vein
name the borders and contents of the triangular space
border: medial border of triceps, teres major, teres minor
contents
circumflex scapular artery and vein
name the borders and contents of the triangular interval
borders: lateral margin of long head of tricepts, shaft of humerus, inferior margin of the teres major
contents: radial artery and profunda brachii artery (deep artery of arm)
pectoralis major origin and insertion
origin clavicular head - anterior surface of medial half of claviacal, sternocostal head, anterior surface of sternum, first seven costal cartilages, sternal end of sixth rib, aponeurosis of external oblique
insertion: lateral lip of intertubecular grove on anterior surface of humerus
pectoralis major innervation
medial and lateral pectoral nerve
pectoralis major action
flexion, adduction, medial rotation of arm at shoulder
subclavius origin and insertion
origin: first rib at junction between rib and costal cartilage
insertion: groove on inferior surface of middle one third of clavicle
subclavius nerve
nerve to the subclavius
pectoralis minor
origin: anterior surfaces and superior borders of ribs 3-5
insertion: coracoid process
pectoralis minor innervation
medial pectoral nerve
pectoralis minor action
pulls top of shoulder down and protracts scapula
subscapularis origin and insertion
origin: medial two thirds of subscapular fossa
insertion: lesser tuberacle of humerus
subscapularis innervation
upper and lower subscapular nerves (c5-7)
lattisimus dorsi origin and insertion
origin: spinus processes of lower six thoracic vertebrae, throacolumbar fascia lower ribs 3-4
insertion: floor of the intertubecular groove of the anterior surface of the humerus
latissimus dorsi innervation
thoracodorsal nerve (C6-8)
lattisimus dorsi action
medial rotation, extension, adduction
origin and insertion of biceps brachii
origin: long head is subraglenoid tuberacle of scapula, short head is coracoid process
insertion: tuberosity of radius
biceps brachii innervation
musculocutaneous nerve (c5-c6)
coracobrachialis origin and insertion
origin: coracoid process
insertion: linear roughening of midshaft of humerus medial side
coracobrachialis innervation
musculocutaneous (c5-c6)
coracobrachialis action
adduction, flexor of arm at shoulder
brachialis origin and insertion
origin: anterior aspect of humerus
insertion: tuberosity of ulna
brachialis innervation
muculocutanous c5=c6
brachialis action
major flexor