Muscle 1
Origin: Posterior iliac crest, spinous processes of t7-s5,
posterior aspect of ribs 9-12, and inferior angle of the scapula
Insertion: medial lip of the intertubecular groove
Latissimus dorsi
subscapularis
o: sub scapular fossa
I: lesser tubercle of the humerus
o and I of opponent pollicis
o: flexor retinaculum and trapezuim
I: shaft of the first metacarpal
sartorius o,a,i
O: asis
I: anterior medial primal tibia at he pes anserinus
A: flexion and medial rotation of the leg at the knee, flexion, abduction and lateral rotation of the thigh at the hip
Piriformis
O: anterior aspect of S2, S3, and S4
I: greater trochanter
A: lateral rotation and abduction of the thigh at the ilofemoral joint
O: medial border of the scapula above the scapulas spine
I transverse process of c1-c4
Levator scapulae
action of the subscapularis
medial rotation and adduction of the arm at the glenohumeral joint and stabilization of the humerus
O: flexor retinaculum and pisiform
I: proximal phalanx of the fifth digit
O: ASIS
I: ilotibial band
A: flexion, abduction and medial rotation of the thigh at the hip
Tensor Fascial Latae
O: anterior bodies of C3-T3
I: anterior aspect of C1-C7
A flexion, lateral flexion, and opposite side rotation of the head and neck
Longus Colli
origin: spinous processes of t2-t5
I: medial border of the scapula below the scapular spine
rhomboid major
iliacus
o: iliac fossa
I: lesser trochanter of the femur
O: lateral supracondylar ridge of the humerus
I: styloid process of the radius
brachioradialis
O: lateral lip of the Lina aspera, inferior greater trochanter, and gluteal tuberosity
I: tibial tuberosity via the patellar ligament
A: extension of the leg at the knee and mild lateral rotation of the leg at the knee
Vastus lateralis
SCM
Sternocleidomastoid
O: manubrium and medial 1/3 of the clavicle
I: superior nuchal line of the occiput and mastoid process of the temporal bone
A:both heads: lateral flexion and opposite side rotation of the head and neck, sternal:flexion of the neck and head, clavicular: extension of the neck and head
the origin and insertion of quadratus lumborum
origin: posterior iliac crest and ilo lumbar ligament
I: transverse process of L1-L4 and 12th rib
pectoralis major
o: medial 1/2 of the clavicle, anterior sternum and cartilage of ribs 1-6
I: lateral lip of the interbubecular groove of the humerus
O: distal half of anterior humerus
I: coronoid process and tuberosity of the ulna
A: flexion of the forearm math the elbow
brachial
gracilis
O: body and inferior ramus of the pubis
I: anterior medial proximal tibia ath e pes anserinus
A: adduction and flexion of the thigh at the ilofemoral joint and flexion and medial rotation of the leg at the tibiofemal joint
Temporalis OIA
O: temporal fossa of the frontal, parietal, sphenoid and temporal bones
I: coronoid process of the mandible
A: elevates the mandible and retraction of the mandible
Erector spinae muscles
ilocostalis
longissimus
spinalis
action of the pectoralis major
medial rotation, adduction, and flexion of the arm at the glenohumeral joint
gastrocnemius origin, insertion and action
O: lateral and medial condyle of the femur
I: calcanea tuberosity via the calcanea tendon
a: plantar flexion of the foot at the talocural join and flexion of the leg at the knee
O: posterior iliac Crest, lateral posterior aspect of the sacrum and coccys
I: itt and gluteal tuberosity of the femur
A: extension, abduction and lateral rotation off the thigh at the hip
gluteus maximus
O: transverse processes of C5-C7
I: second rib
A: lateral flexion and same side rotation of the head and neck as well as elevation of the 2nd rib
Posterior Scalene