Download Summary of all muscles

Primary Muscles of the Human Body
Mucles of the neck
Muscle
Origin
Insertion
Sternocleidomatoid
Sternum and Clavicle
Mastoid Process
Splenius
C4 - C7
Occipital bone &
Temporal Bone
Rotates head
Ribs 1 & 2
Flexes and rotates neck,
Elevates first and
second rib
Occipital Bone
Extends Neck (Head)
Scalenus
- Anterior
- Posterior
Semispinalis
Anterior: C3 - C6
Posterior: C2 - C7
C4 – T6
Action
Rotates head and flexes
neck
Muscles of the Vertebral Column
Muscle
Origin
Insertion
Spinalis
C1 - T12
C1 - T12
Longissimus
C1 – L5
Mastoid process and
C1 – T12
Iliocostalis
Sacrum & L1 - L5
Ribs and cervical
vertebrae
Action
Extend the spine
Laterally flexes the spine
Extend the spine
Laterally flexes the head
and spine
Extend the spine
Laterally flexes the spine
Muscles of the Thoracic Cage
Muscle
Diaphragm
Origin
Sternum, ribs 10-12 &
L1-L5
Insertion
Action
Central Tendon
Inhalation/Inspiration
Internal Intercostal
Muscles
Inferior surface of
ribs 1-11
Superior surface of
ribs 2-12
Depresses ribs
External Intercostal
Muscles
Inferior surface of
ribs 1-11
Superior surface of
ribs 2-12
Elevates ribs
Muscles of the Abdomen
Muscle
Origin
Symphysis Pubis
and Pubis
Insertion
Xyphoid Process and
Lower ribs
Internal Oblique
Iliac Crest
Ribs 8-12
External Oblique
Ribs 5-12
Iliac Crest
Transversus
Abdominis
Ribs 5-12
Iliac Crest
Rectus Abdominis
Action
Flexes the trunk
Laterally flexes and
rotates trunk
Laterally flexes and
rotates trunk
Laterally flexes and
rotates trunk
Muscles acting on the upper limb
Muscle
Origin
Insertion
Pectoralis Major
Clavicle, Sternum
Ribs 1 - 6
Head of humerus
(Anterior side)
Latissmus Dorsi
T7 - L5, Iliac Crest &
Sacrum
Head of humerus
(Anterior side)
Action
Flexes, adducts &
medially rotates
(internal) arm
Extends, adducts &
medially rotates
(internal) arm
Muscles of the Rotator Cuff
Muscle
Origin
Insertion
Action
Stabilizes shoulder and
Abducts arm
Supraspinatus
Supraspinous Fossa
Head of the Humerus
Infraspinatus
Infraspinous Fossa
Head of the Humerus
Stabilizes shoulder
Extends and laterally
rotates arm
Subscapularis
Subscapular Fossa
Head of the Humerus
Stabilizes shoulder and
Medially rotates arm
Muscles that position the Scapula
Muscle
Origin
Insertion
Trapezius
Occipital Bone & C7 –
T12
Clavicle, Acromion and
Spinous Process
** Pectoralis Minor
Ribs 3 - 5
Coracois Process
Action
Extends Head
Elevates Scapula
Adducts scapula
Depresses Scapula &
Elevates Ribs 1-5
Scapular Muscles that Move the Humerus
Muscle
Origin
Insertion
Action
Deltoid
Clavicle, Acromion, and
Scapular Spine
Humerus (just below the
head of the humerus)
Abducts, Flexes and
laterally rotates arm
** Coracobrachialis
Coracoid Process
Midshaft of the Humerus
Adduct and Flexes arm
Elbow Flexors and Extensors
Muscle
Biceps Brachii
Brachialis
Brachioradialis
Triceps Brachii
Origin
Above the Glenoid
Cavity
Anterior surface of the
humerus
Lateral surface of the
humerus
Posterior surface of
humerus & Below the
Glenoid Cavity
Insertion
Radius
Action
Flexes Arm and forearm
Supinates forearm
Proximal end of ulna
Flexes forearm
Radius
Flexes forearm
Proximal portion of the
ulna
Extends Arm and
forearm
Supination and Pronation of the Foreoarm
Muscle
Supinator
Pronator Teres
Origin
Lateral epicondyle of the
humerus
Insertion
Proximal Shaft of the
Radius
Medial epicondla of
humerus
Lateral Radius midshaft
Action
Supinates hand
Pronates hand
Hand and Wrist Muscles
Muscle
Flexor Carpi Radialis
Origin
Medial Epicondyle of
humerus
Insertion
Action
Metacarpals 2 and 3
Flexes and Abduct Hand
Flexor Carpi Ulnaris
Medial epicondyle of the
humerus
Pisiform & Metacarpal 5
Flexes and adducts
hand
Extensor Carpi Radialis
Lateral Epicondyle of
humerus
Metacarpal 3
Extends and abducts
hand
Extensor Carpi Ulnaris
Lateral Epicondyle of
humerus
Metacarpal 5
Extends and adducts
hand
Hip Flexors and Extensors
Muscle
Origin
Insertion
Action
Extends and Laterally
rotates thigh
Gluteus Maximus
Ilium, Sacrum, Coccyx
Posterior Side of Femur
Gluteus Medius
Iliac crest
Posterior Side of the
Greater Trochanter of
the Femur
Medially rotates and
abducts thigh
Gluteus Minimus
Iliac Crest
Anterior Side of the
femur
Medially rotates and
abducts thigh
Sartorius
Anterior surface of the
Iliac Crest
Medial Side of Tibia
Flexes thigh and Leg &
Laterally rotates thigh
Iliacus
Iliac Crest
Lesser Trochanter of the
Femur
Flexes Thigh
Psoas Major
L1 – L5
Lesser Trochanter of
Femur
Flexes Thigh
Hip Adductors
Muscle
Origin
Insertion
Action
Adductor Muscles
Pubis
Shaft of Femur
Adducts Thigh
Pubis
Proximal Portion of the
medial condyle of the
Tibia
Adducts thigh
Flexes Knee
Gracilis
Anterior Thigh - Quadriceps Group
Muscle
Origin
Anterior surface of the
Ilium
Insertion
Common Tendon inserts
on the Tibial tuberosity
Action
Flexes Thigh & Extends
Knee
Vastus Lateralis
Greater Trochanter of
the Femur
Common Tendon inserts
on the Tibial tuberosity
Knee Extension
Vastus Intermedius
Anterior Shaft of the
Femur
Common Tendon inserts
on the Tibial tuberosity
Knee Extension
Vastus Medialis
Anterior Shaft of the
Femur
Common Tendon inserts
on the Tibial tuberosity
Knee Extension
Rectus Femoris
Posterior Thigh - Hamstring Group
Muscle
Insertion
Action
Head of Fibula
Extends the hip & Flexes
Knee
Semimembranosus
Posteroir Surface of
Ischium
Medial Tibial condyle
Extends Hip, Flexes
knee & medially rotates
leg
Semitendinosus
Posteroir Surface of
Ischium
Proximal part of tibia
below the medial
condyle
Extends Hip, Flexes
knee & medially rotates
leg
Muscle
Origin
Tibialis Anterior
Anterior shaft of Tibia
Gastrocnemius
Biceps Femoris
Origin
Posteroir Surface of
Ischium & Posterior
Shaft of the Femur
Extrinsic Foot Muscles
Insertion
First metatarsal and
medial cuneiform
Action
Dorsiflexion and inverts
the foot
Lateral and Medial
condyles of femur
Calcaneus
Flexes knee & Plantar
Flexion
Soleus
Posterior tibia and fibula
Calcaneus
Plantar Flexion
Tibialis Posterior
Posterior tibia and fibula
Navicular
Plantar flexion and
inverts the foot
Fibularis
Fibula
First Metatarsal
Plantar flexion and
everts the foot