Muscles of the Head and Neck
NAME
Frontalis
(Epicranius)
Occipitalis
(Epicarnius)
Orbicularis oculi
Orbicularis oris
ORIGIN
Caranial
aponeurosis
Occipital bone
INSERTION
Skin of eyelids
Cranial aponeurosis
Zygomaticus major
Orbit
Maxillae,
mandible
Zygomatic bone
Eyelids
Lips
Angle of mouth
Masseter
Zygomatic arch
Ramus of mandible
Temporalis
Temporal bone
Sternocleidomastoid
Sternum, clavicle
Coronoid process of
mandible
Mastoid process of
temporal bone
ACTION(S)
Raises eyebrows, moves scalp,
forehead skin
Moves scalp, forehead skin,
eyebrows
Closes eyes
Closes lips, purses lips, aids in
speech
Draws corners of mouth up to
smile and laugh
Elevates mandible to bite and
chew
Retracts mandible
Draws head forward and down
or to the side
Muscles of the Thorax and Shoulder
NAME
Pectoralis major
Serratus anterior
Deltoid
External
intercostals
Internal
intercostals
Diaphragm
ORIGIN
Sternum, costal
cartilages,
clavicle
Ribs
INSERTION
Greater tubercle of
humerous
ACTION(S)
Flexes, adducts and medially
rotates humerus
Clavicle,
Acromion, spine
of scapula
Rib above
Medial, interior
surface of scapula
Deltoid
Tuberosity of
humerus
Rib below
Protracts, holds scapula
against chest wall
Abducts humerus
Rib below
Rib above
Sternum, ribs,
vertebral column
Its own central
tendon
Elevates ribs during
inspiration
Depresses ribs during
inspiration
Prime mover of inspiration,
compresses abdomen to
defecate, urinate, childbirth
Muscles of the Abdominal Wall and Posterior Trunk
NAME
Rectus abdominis
ORIGIN
Pubis
External oblique
Lower 8 ribs
Trapezius
Occipital bone,
thoracic
vertebrae
Thoracic, lumbar
vertebrae, ribs
Latissimus dorsi
INSERTION
Sternum and lower
ribs
Pubis, iliac crest, linea
alba
Scapula, both above
and below the spine
ACTION(S)
Flexes waist for sit-ups
Flexes and rotates vertebrae
Intertubercular
groove of humerus
Extends, adducts, medially
rotates humerus
Abducts and extends the
neck
Muscles of the Upper Extremity
NAME
Triceps brachii
Biceps brachii
ORIGIN
Humerus and
scapula
Scapula (Coracoid
process, glenoid
fossa)
INSERTION
Ulna (Olecranon
process)
Radius (radial
tuberosity)
ACTION(S)
Extends forearm
Flexion of the elbow, flexes
arm and forearm, supinates
hand
Muscles of the Pelvis
NAME
Iliosoas
Gluteus maximus
Gluteus medius
ORIGIN
Iliac crest,
lumbar vertebrae
Iliac crest,
sacrum, coccyx
Iliac crest
INSERTION
Femus (lesser
trochanter)
Femur (Gluteal
tuberosity) and
iliotial tract
Femur (Greater
trochanter)
ACTION(S)
Flexes hip, flexes thigh on
thrunk
Extends and laterally rotates
thigh
Abducts and medially rotates
thigh
Muscles of the Thigh
NAME
Adductor group
ORIGIN
Pubis, ischium
Sartorius
Anterior superior
iliac spine
Ilium and femur
Quadriceps femoris
Hamstring
Ischial
tuberosity, femus
INSERTION
Medial length of
femur
Tibia
Via patellar tendon,
to Patella, to Patellar
ligament. To tibial
tuberosity
Tibia, femur
ACTION(S)
Adducts thigh
Flexes leg and thigh, rotates
thigh laterally
Extends thigh, flexes leg
Extends leg
Muscles of the Leg
NAME
Gsatrocnemius
Peroneus longus
ORIGIN
Femur (Medial,
lateral condyles)
Fibula
Tibialis anterior
Tibia
INSERTION
Calcaneal (Achilles)
tendon to calcaneus
Laterally to plantar
surface of foot at
first metatarsal
Medially to Plantar
surface of foot at
first metatarsal
ACTION(S)
Plantar flexes the foot
Everts foot
Dorsiflexes and inverts foot