Upper Arm

Biceps Brachii

Origin: short-coracoid process of scapula

long - supraglenoid tubercle of scapula

Insertion: radial tuberosity

Upper Arm

Coracobrachialis

Circumducts forearm

Origin: short head, coracoid process of scapula

Insertion: medial surface of humerus

Upper Arm

Brachialis

Inside of elbow

Origin: distal anterior humerus

Insertion: Ulna

Upper Arm

Triceps Brachii

Extends forearm

Origin: infraglenoid tubercle of scapula

Insertion: Olecranon process of ulna

Forearm

Pronator Teres

Pulls radius over, inside of elbow

Origin: humeral head - media epicodyle

ulnar head - coranoid process

Insertion: lateral surface of radius

Forearm Muscles

Flexor Digitorum Superficialis

Flexes finger muscles, makes fist

Origin: humerulnerhead medial epicodyle

Insertion: middle phalanx of each digit other than thumb

Upper Arm

Brachioradialis

Arm to radius

Origin: lateral supercondylar ridge of humerus

Insertion: ends in flat tendon on radial side of tendon

Forearm

Extensor Digitorum

Extends digits

Origin: humerus lateral epicodyle

Insertion: extensor expansions of each digit other than thumb

Upper Arm

Deltoid

Shoulder Muscle

Origin: lateral 3rd of clavicle, spine of scapula

Insertion: deltoid suberosity of humerus

Upper Arm

superspinatus

infraspinatus

Supra above infra below

 Origin: scapula, supra infra fossa

Insertion: humerus

Sternum

Rectus Abdominus

Stomach Muscle

Origin: Pubis

Insertion: cartilage of 5th, 6th, and 7th ribs and xiphoid process

Sternum

Serratus Anterior

Ribs

Origin: Outer surface of first 8 to 9 ribs

Insertion: Ventral Aspect of vetebral border of scapula

Sternum

Pectoralis Major

Big Chest Muscle

Origin: clavicle, sternum, external oblique

Insertion: Intertubercular groove of humerus

Sternum

External Abdominal Oblique

Side of abdomen/ribs

Origin: external surface inferior borders of lower 8 ribs

Insertion: Iliac crest, linea alba

Back

Erector Spinae

Keeps your back erect

Origin: iliac crest, posterior sacrum, serial and lumbar spinous processes

Insertion: lower ribs, cervical transverse spinal processes

Back

Latissimus Dorsi

Large muscles on lower sides of back

Origin: thoracolumbar fascia

T1-T6 vertebrae

Insertion: intertubercular groove of the humerus

Back

Levator Scapulae

Lifts scapula

Origin: C4 transverse processes

Insertion: medial border of scapula

Back

Splenius Capitus/Cervicus

Deeper back to neck muscle

Origin: c6/c7 spinous processes

Insertion: capitus:mastoid process

Back

Seminspinalus capitus

balances head

origin: t1-t7/c7 spinous processes

insertion: nuchal line on occipital bone

Back

Trapezius

moves shoulders up and down

origin: occipital nuchal line, c7 and t1-t12 spinous processes

insertion: clavicle, acromion, scapular spine

Neck

Sternohyodeus

Adams apple

Origin: sternum

Insertion: hyoid

Neck

Sternocleido-Mastoideus

Big muscle on side of neck

Origin: manubrium of sternum

Insertion: Mastoid process, temporal bone

Jaw

Temporalis

Big muscle on side of head that moves for mastification of jaw

origin: temporal fossa

insertion: anterior border of ramus and mandible

Jaw

Masseter

big muscle on cheek for jaw mastification

origin: zygomatic arch

insertion: lateral mandible and coranoid process

Thigh

Sartorius

rotates leg outward

origin: anterior superior iliac spine

insertion: superior medial surface of tibial shafts

Leg

Rectus femoris

extends lower legs

origin: anterior inferior iliac spine

insertion: quadriceps tendon, patellar ligament into tibial tuberosity

Leg

Biceps Femoris

moves leg backwards of forwards

origin: ischial tuberosity and linea aspera

insertion: lateral side of head of fibula

Leg

Femur and Greater Trochanter

Lower Leg

Tibialis Anterior

flexion of the foot

origin: lateral condyle of tibia

insertion: medial cuneiform tarsal, base of first metatarsal

Lower Leg

Gastrocnemius

extends feet, calf muscles

origin: medial and lateral condyle of femur

insertion: both heads of soleus form calcaneal tendon

Lower Leg

Soleus

smaller calf muscles

origin: posterior surface of head of fibula

insertion: calcaneal tendon, posterior surface of calcaneus

origin: fixed end or attachment of muscle

insertion: attachment muscle to bone that it moves

high vascularization (high blood supply), high endurance, slow contraction

ex: long distance runner

low vascularization, low endurance, contract quickly

ex. sprinters

Muscle tissue and molecular level

Thin filament: acting, tropomin, tropomyosin

Thick Filament: myosin

Muscle Microanatomy

Z-bands

Anchor for the thin filament, anchor for actin

Muscle Microanatomy

I-Bands

Muscle Microanatomy

A-Bands

Anisitropic bands

where actin and myosin interact

Muscle Microanatomy

H-Bands

Striated Muscle