muscles of the upper limbs Flashcards
pectoralis major muscle origin
clavicle ,sternum and upper six costal cartilliages
pectoralis major insertion
lateral lip of the bicipetal groove of the humerus
nerve supplyof pectorlais major
lateral and medial pectoral nerve
action of pectoralis major
adduction of the shoulder and medial rotation
pectoralis minor origin
third fourth and fifth ribs
pectoralis minor insertion
coracoid process of scapula
pectoralis minor nerve supply
medial pectoral nerv e
action of pectoralis minor
stabalization and protraction of scapula
subcalvious origin
first costal cartilage
subcalvious insertion
inferior surface of clavicle
subcalvious nerve supply
nerve to subcalvion
action of subcalvious
depresses and stablizes the clavicle
serratus anterior musle origin
upper 8 or 9 ribs
insertion of serratus anterior muscle
medial borde and inferior angle of scapula
nerve supplyof serratus anterior
long thoracic nerve
action of serratus anterior muscle
moves teh scapula forward around the thorcic wall; rotates teh scapula
deltoid origin
lateral third of teh clavicle, acromoin and the lower surface of the spine of the scapula
deltoid insertion
deltoid tuberosity
deltoid innervation
axillary nerve
deltoid acton
middle fibers: abducts the shoulder
anterior fibers:flexes the shoulder
posterior fibers; extension of the shoulder
origin of trapezius
ligamentum nuchae
skull-external occipital protuberance
verteberae spines of C7-T12
insertionn of trapezius
clavicle lateral 1/3
scapula- acromoin and spine
innervation of trapezius
accessory
action of trapezius
extends the head
retracts the scapula
elevates the shoulder (upper fibers)
depresses the shoulder (lower fibers)
origin of latissmus dorsi
vertebrae spines T6-T12
pelvic bone- lilac crest
thoracolumbar fascia
insertion of latissmus dorsi
floor of the bicipital groove
innervation of latissmus dorsi
thoracodorsal nerve
action of latissmus dorsi
adducts extends and medially rotates the shoulder
supraspinatous origin
supraspinous fossa of scapula
supraspinatous insertion
greater tuberosity of humerus and capsule of the joint
supraspinatous nerve supply
suprascapular nerve
supraspinatous action
abducts the arm and stablizes theshoulder joint
infraspinatous origin
infraspinous fossa of scapula
infraspinatous insertion
greater tuberosity of humerus capulse of the shoulder joint
infrapsinatous nerve supply
suprascapular nerve
infraspinatous action
laterally rotates the arm and stablizes the shoulder joint
teres major origin
lower tird of teh lateral border of scapula
teres major insertion
medial lip of the bicipital groovre of the humerus
teres major nerve supply
lower subscapular nerve
teres major action
medial rotation and adducts the arm and stablizes the joint
teres minor origin
upper two thirds of the lateral border of scapula
teres minor insertion
greater tuberosity of humerud and capsule of the joint
teres minor innervation
axillar nerve
teres minor action
lateral rotation and stablizes the shoulder joint
subscalpularis origin
subscalpular fossa
subscalpularis insertion
lesser tuberosity of humerus
subscalpularis nerve supply
upper and lower subscalpular nerve
subscalpularis action
medially rotates the arm and stablizes the shoulder joint
subscalpularis action
medially rotates the arm and stablizes the shoulder joint
levator scapulae origina nd insertion
origin: C1-C4 transverse processes
insertion : medial border and superior angle of scapula
rhomboid minor o and i
o: C7 and T1
i: medial border of scapula
rhomboid major o and i
o: T2-T5
i: medial border of scapula to the inferior angle of the scapula
levator scapulae, rhomboid minor and major nerve supply and action
nerve supply: dorsal scapular nerve
action: elevate and adduct the scapula