Anatomy Lecture Muscles

pectoralis major origin

clavicle, sternum, ribs

pectoralis major insertion

greater tubercle of humerus

Pectoralis major action

shoulder flexion, adduction, internal rotation

innervation of pectoralis major

medial and lateral pectoral nerves

deltoid origin

clavicle and scapula

deltoid insertion

deltoid tuberosity of humerus

deltoid action

Shoulder flexion, abduction

deltoid innervation

axillary nerve

Trapezius Origin

occipital bone, cervical and thoracic vertebrae

Trapezius Insertion

clavicle and scapula

trapezius action

Elevation, retraction, adduction, depression of scapula

Trapezius Innervation

accessory nerve

latissimus dorsi origin

thoracic and lumbar vertebrae

latissimus dorsi insertion

intertubercular sulcus of humerus

Latissimus dorsi action

arm extension, adduction, medial (internal) rotation

Latissimus dorsi innervation

thoracodorsal nerve

Rhomboid major & minor origin

spinous process of thoracic vertebrae

Rhomboid major & minor insertion

scapula

Rhomboid major & minor action

retraction of scapula

Rhomboid major and minor innervation

dorsal scapular nerve

supraspinatus origin

supraspinous fossa of scapula

Supraspinatus insertion

greater tubercle of humerus

supraspinatus action

arm abduction at shoulder

supraspinatus innervation

suprascapular nerve

4 rotator cuff muscles

supraspinatus, infraspinatus, teres minor, subscapularis

Which rotator cuff muscle can be seen in anterior view?

Subscapularis

Which rotator cuff muscles can be seen in posterior view?

Supraspinatus, infraspinatus, teres minor

biceps brachii origin

long head: supraglenoid tubercle of scapula

short head: coracoid process of scapula

biceps brachii insertion

radial tuberosity of radius

biceps brachii action

elbow flexion

Biceps brachii innervation

musculocutaneous nerve

Triceps brachii origin

Long head: infraglenoid tubercle of scapula

Lateral head: proximal shaft of humerus

Medial head: distal shaft of humerus

coracobrachialis origin

coracoid process of scapula

Coracobrachialis insertion

shaft of humerus

action of coracobrachialis

arm flexion and adduction

Coracobrachialis innervation

musculocutaneous nerve

flexor digitorum superficialis origin

medial epicondyle of humerus

Flexor digitorum superficialis insertion

middle phalanges of digits 2-5

Flexor digitorum superficialis action

finger flexion

Flexor digitorum superficialis innervation

median nerve

Brachioradialis origin

lateral epicondyle of humerus

brachioradialis insertion

radial styloid process

brachioradialis action

elbow flexion

Brachioradialis innervation

radial nerve

Extensor digitorum origin

lateral epicondyle of humerus

Extensor digitorum insertion

distal phalanges of digits 2-5

Extensor digitorum action

finger extension

Extensor digitorum innervation

radial nerve

iliacus origin

iliac fossa

iliacus insertion

lesser trochanter of femur

iliacus action

hip flexion

iliacus innervation

femoral nerve

Sartorius origin

anterior superior iliac spine

Sartorius insertion

tibial tuberosity

sartorius action

hip flexion, abduction, external (lateral) rotation, knee flexion

sartorius innervation

femoral nerve

rectus femoris origin

anterior inferior iliac spine

rectus femoris insertion

tibial tuberosity

rectus femoris action

hip flexion, knee extension

Rectus Femoris innervation

femoral nerve

gluteus maximus origin

ilium, sacrum, coccyx

gluteus maximus insertion

gluteal tuberosity of femur and iliotibial tract

Gluteus Maximus action

hip extension

gluteus maximus innervation

inferior gluteal nerve

gluteus medius origin

ilium

gluteus medius insertion

greater trochanter of femur

gluteus medius action

hip abduction

Gluteus medius innervation

superior gluteal nerve

Biceps Femoris origin

long head: ischial tuberosity

short head: distal shaft of femur

Biceps Femoris insertion

head of fibula

Biceps Femoris action

thigh extension, knee flexion

Biceps Femoris innervation

sciatic nerve

piriformis origin

sacrum

piriformis insertion

greater trochanter of femur

piriformis action

lateral rotation of thigh

gracilis origin

pubis

gracilis insertion

tibia

gracilis action

hip adduction and knee flexion

gracilis innervation

obturator nerve

Tibialis anterior origin

Tibia

tibialis anterior insertion

1st metatarsal

Tibialis anterior action

dorsiflexion

tibialis anterior innervation

deep fibular nerve

gastrocnemius origin

medial and lateral condyles of femur

gastrocnemius insertion

calcaneus (achilles tendon)

gastrocnemius action

plantar flexion

gastrocnemius innervation

tibial nerve

soleus origin

tibia and fibula

soleus insertion

calcaneus via achilles tendon

soleus action

plantar flexion

soleus innervation

tibial nerve

Tibialis posterior origin

tibia and fibula

tibialis posterior insertion

Metatarsals 2-5

tibialis posterior action

Inversion of foot

Plantarflexion of ankle

Tibialis posterior innervation

tibial nerve

fibularis longus origin

head of fibula

fibularis longus insertion

1st metatarsal

fibularis longus action

eversion of foot

Fibularis longus innervation

superficial fibular nerve

orbicularis oris

closes lips