Muscles Origins and Insertions Flashcards
Trapezius
Origin: Occipital Bone
Insertion: Clavicle
Action: Rotates scapula
Rhomboideus major
Action: Raises scaupula
Levator Scapulae
Action: Elevates scapula
Serratus anterior
Origin: outer surfaces of the upper ribs
Insertion: Ventral surface of scapula
Action: Pulls scapula anteriorly and downward
Pectoralis Minor
Origin: Sternal ends of the upper rib
Insertion: Coracoid process of scapula
Action: raises ribs
Coracobrachialis
Origin: Coracoid process of scapula
Insertion: Shaft of humerus
Action: Flexes and adducts the arm
Pectoralis Major
Origin: Clavicle
Insertion: Intertubercular groove of humerus
Action: rotates arm medially
Latissimus Dorsi
Origin: lower ribs
Insertion: Intertubercular groove of humerus
Action: rotates the arm medially
Deltoid
Origin: Clavicle
Insertion: Deltoid tuberosity of the humerus
Action: flexes arm
Biceps Brachii
Origin: Coracoid Process of scapula
Insertion: Radial tuberosity of radius
Action: Flexes forearm at elbow
Brachialis
Origin: Anterior shaft of humerus
Insertion: Coronoid Process of ulna
Action: Flexes forearm at elbow
Brachioradialis
Origin: Distal lateral end of the humerus
Insertion: Lateral surface of radius above styloid process
Action: Flexes forearm at elbow
Triceps Brachiii
Origin: Tubercule below glenoid cavity
Insertion: Olecranon process of ulna
Action: Extends forearm at elbow
Supinator
Origin: Lateral epicondyle of humerus
Insertion: Lateral surface of radius
Action: Rotates forearm laterally
Pronator Quadratus
Origin: Anterior distal end of ulna
Insertion: Anterior distal end of radius
Action: Rotates forearm medially
Orbicularis Occuli
Origin: Maxillary
Insertion: Skin around eye
Action: Closes eyes as in blinking
Orbicularis Oris
Origin: Muscles near the mouth
Insertion: Skin of central lip
Action: protudes lips as for kissing
Buccinator
Origin: Outer surfaces of maxilla
Insertion: Orbicularis oris
Action: Compresses cheeks inward as when blowing air
Zygomaticus
Origin: Zygomatic Bone
Insertion: Orbicularis Oris
Action: Raises corner of mouth as when smiling
Playsma
Origin: Fascia in upper chest
Insertion: Lower border of mandible
Action: Draws angle of mouth downward as in pouting
Masseter
Origin: Lower border of zygomatic arch
Insertion: Lateral surface of mandible
Action: Elevates mandible
Temporalis
Origin: Temporal bone
Insertion: Interior rams of mandible
Action: Elevates mandible
Medial pterygoid
Action: Moves mandible from side to side
Lateral pyerygoid
Action: Depresses and protracts mandible
Sternocleidomastoid
Origin: Anterior surface of sternum
Insertion: Mastoid process of temporal bone
Action: elevates sternum
Splenius capitis
Origin: Spinous processes of lower cervical vertebrae
Insertion: Occipital bone
Action: Extends neck
Semispinalis capitis
Origin: Processes of lower cervical vertebrae
Insertion: Occipital bone
Action: Rotates head
External Oblique
Origin: Outer surfaces of lower ribs
Insertion: linea alba
Action: Tenses abdominal wall
Internal Oblique
Origin: Crest of Ilium
Insertion: Linea alba
Action: Tenses abdominal wall
Transversus Abdominis
Origin: Processes of lumbar vertebrae
Insertion: Linea alba
Action: tenses abdominal wall
Rectus Abdominis
Origin: Symphysis Pubis
Insertion: Xiphoid Process of Sternum
Action: Tenses abdominal wall
Epicranius
Origin: Occipital bone
Insertion: Skin and muscles around eye
Action: Raises eyebrows as when suprised
Levator Ani
Origin: Pubic bone
Insertion: Coccyx
Action: Supports pelvic viscera
Coccygeus
Origin: Ischial spine
Insertion: Sacrum
Action: Supports pelvic viscera
Bilbospongiosus
Origin: Centeral tendon
Insertion:
(male) fascia of penis
(female) clitoris
Action:
(male) Assists emptying of urethra
(female) Constricts vagina`
Ischiocavernosus
Origin: Ischial tuberosity
Insertion: Pubic arch
Action: Assists function of bulbospongiosus
Sphincter urethrae
Opens and closes urethra
Psoas major
Origin: Lumbar intervertebral discs
Insertion: Lesser trochanter of femur
Action: Flexes thigh
Iliacus
Origin: Iliac fossa of Ilium
Insertion: Lesser trochanter of femur
Action: Flexes Thigh
Gluteus Maximus
Origin: Sacrum
Insertion: Posterior surface of femur
Action: Extends thigh at hip
Gluteus Medius
Origin: Lateral surface of ilium
Insertion: Greater trochanter of femur
Action: Rotates thigh medially
Gluteus Minimus
Origin: Lateral surface of ilium
Insertion: Greater trochanter of femur
Action: rotates thigh medially
Tensor fasciae latae
Origin: Anterior Illiac Crest
Insertion: Iliotibial Band
Action: Rotates thigh medially
Adductor longus
Action: Flexes thigh
Adductor Magnus
Action: Extends thigh
Gracilis
Origin: Lower edge of pubic symphasis
Insertion: Medial surface of tibia
Action: Flexes leg at the knee
Biceps femoris
Origin: Ischial tuberosity
Insertion: Head of fibula
Action: Extends thigh
Semitendinosus
Origin: Ischial tuberosity
Insertion: Medial surface of tibia
Action: Extends thigh
Semimembranosus
Origin: Ischial tuberosity
Insertion: Medial condyle of tibia
Action: Rotates thigh laterally
Sartorius
Origin: Anterior superior illiac spine
Insertion: Medial surface of tibia
Action: Rotates thigh laterally
Rectus femoris
Origin: Spine of Ilium
Insertion: Patella
Action: Extends leg at knee
Vastus Lateralis
Origin: Posterior surface of femur
Insertion: Patella
Action: Extends leg at knee
Vastas Medialis
Origin: Medial surface of femur
Insertion: Patella
Action: Extends leg at knee
Vastus Intermedius
Origin: Anterior surface of femur
Insertion: Patella
Action: Extends leg at knee
Tibialis Anterior
Origin: Lateral surface of tibia
Insertion: first metatarsal
Action: Dorsiflexion
Extensor Digitorum Longus
Action: Extension of toes
Gastroscnemuis
Origin: Lateral and medial condyles of femur
Insertion: Posterior surface of calcaneus
Action: Flexion of leg at knee
Soleus
Origin: Head and shaft of fibula
Insertion: Posterior surface of calcaneus
Action: Plantar flexion of foot
Flexor Digitorum Longus
Action: Flexion of four lateral toes
Fibularis Longus
Origin: Lateral condyle of tibia
Insertion: Tarsal and metatarsal bones
Action: Eversion of foot
