Muscles origins & insertions Flashcards
Occipitalis
Origin: Occipital and temporal bones
Insertion: Galea aponeurotica
Function: Pulls scalp posterior
Frontalis
Origin: Galea aponeurotica
Insertion: Skin of eyebrows and root of nose
Function: Raises eyebrows and wrinkles forehead
Temporalis
Origin: Temporal fossa
Insertion: Coronoid process of madible
Function: Closes jaw
Orbicularis Oculi
Origin: Frontal and maxilaary bones
Insertion: Tissue of eyelid
Function: Blinking; squinting
Zygomaticus Major
Origin: Zygomatic bone
Insertion: Skin and muscle at corner mouth
Function: Smiling
Masseter
Origin: Zygomatic arch and maxilla
Insertion: Angle and ramus of mandible
Function: Elevates mandible
Orbicularis Oris
Origin: Arises from maxillae and mandible
Insertion: encircles the mouth
Function: Kissing
Platysma
Origin: Fascia of Chest
Insertion: Lower margin of mandible
Function: Depress mandible
Sternocleidomastoid
Origin: Manubrium and medial end of clavicle
Insertion: Mastoid process
Function: Head flexion
Trapezius
Origin: Occipital bone; spines C7 and T1-12
Insertion: Acromion and spoine of scapula and lateral third of clavicle
Function: Raises and rotates Scapula
Deltoid
Origin: Lateral 3rd of clavicle; acromion and spine of scapula
Insertion: Deltoid tuberosity of humerus
Function: Arm abdduction
Teres Major
Origin: Posterior surface of scapula at inferior angle
Insertion: Intertubercular sulcus of humerus
Function: Medial Rotates and adducts humerus
Teres Minor
Origin: Lateral border of posterior scapula
Insertion: Greater tubercle of humerus
Function: Stabilizes humerus, rotates humerus laterally
Infraspinatus
Origin: Infraspinous fossa
Insertion: Greater tubercle of humerus
Function: Stabilizes humerus, rotates humerus laterally
Supraspinatus
Origin: Supraspinous fossa
Insertion: Greater tubercle of humerus
Function: Stabilizes humerus, prevents downward dislocation
Subscapularis
Origin: Subscapular fossa
Insertion: Lesser tubercle of humerus
Function: rotates humerus medial, stabilizes humerus
Pectorlis Major
Origin: Sternum; cartilages of ribs 1-6
Insertion: Greater tubercle of humerus
Function: Arm flexion
Pectorlis Minor
Origin: Anterior surface of ribs 3-5
Insertion: Coracoid process of scapula
Function: Scapula forward and downward
Latissimus Dorsi
Origin: Spines T6-12, Lumbar, lower 3 ribs, iliac crest
Insertion: Intertubercular sulcus of humerus
Function: Arm extension
Serratus Anterior
Origin: Ribs 1-8
Insertion: Anterior surface of vertebral border
Function: Hold scapula against chest wall
Rectus Abdominis
Origin: Pubic Crest and symphysis
Insertion: Xiphoid process and ribs 5-7
Function: Flex and rotates lumbar region
External Oblique
Origin: outer surface of lower 8 ribs
Insertion: Insert into linea alba
Function: Aid in flexing vertebral column with rectus
Internal Oblique
Origin: Lumbar fascia; iliac crest
Insertion: Linea alba; pubic crest
Function: Aid in flexing vertebral column with rectus
Transversus Abdominis
Origin: Inguinal ligament;iliac crest; last 6 ribs
Insertion: Linea alba; pubic crest
Function: Compress abdominal contents
Triceps Brachii
Origin: Infraglenoid tubercle; Poster shaft
Insertion: Olecranon process of ulna
Function: Forearm extension
Biceps Brachii
Origin: Coracoid process; tubercle of glenoid cavity
Insertion: Radial tuberosity
Function: Flexes elbow joint
Brachioradialis
Origin: Lateral supercondylar ridge
Insertion: Base of styloid process
Function: Forearm flexion
Brachialis
Origin: Front of distal humerus
Insertion: Coronoid process of ulna
Function: Forearm flexion
Gluteus Maximus
Origin: Dorsal ilium; sacrum; coccyx
Insertion: Gluteal tuberosity of femur
Function: Extensor of thigh
Gluteus Medius
Origin: Anterior and posterior gluteal line
Insertion: Greater trochanter of femur
Function: Abducts and medial rotates
Gluteus Minimus
Origin: Anterior and inferior gluteal lines
Insertion: Greater trochanter of femur
Function: Abducts and medial rotates
Tensor Fascia Latae
Origin: Anterior iliac crest; anterior superior iliac spine
Insertion: Iliotibial Tract
Function: Flexes and abducts thigh
Sartorius
Origin: Anterior superior iliac spine
Insertion: Medial aspect of proximal tibia
Function: Flexes, abducts and laterally rotates thigh
Iliotibial tract
Origin: Iliac crest
Insertion: knee
Function:
Rectus Femoris
Origin: Anterior Iliac crest
Insertion: Patella and tibial tuberosity
Function: Extends knee and flexes hip
Vastus Lateralis
Origin: Greater Trochanter
Insertion: Patella and tibial tuberosity
Function: Extends and stabilizes knee
Vastus medialis
Origin: Linea aspera
Insertion: Patella and tibial tuberosity
Function: Extends knee
Vastus Intermedius
Origin: Anterior and lateral surface of proximal femur
Insertion: Patella and tibial tuberosity
Function: Extends knee
Gracilis
Origin: Inferior Ramus and body of pubis
Insertion: Inferior to its medial condyle
Function: Adducts thigh
Adductor longus
Origin: Pubis near pubic symphysis
Insertion: Linea aspera
Function: Adducts thigh
Adductor Magnus
Origin: Ischial and pubic rami and ishcial tuberosity
Insertion: linea aspera and adductor tubercle of femur
Function: Adducts thigh, medially rotates thigh
Iliopsoas
Origin: see iliacus and Psoas Major
Insertion: see iliacus and posas major
Function: Posture
Semitendinosus
Origin: Ischial tuberosity
Insertion: medial aspect of upper tibial shaft
Function: Extends thigh;flexes knee
Biceps Femoris
Origin: Ischial tuberosity
Insertion: Lateral condyle of tibia
Function: Extends thigh;flexes knee
Gastrocnemius
Origin: Medial and Lateral condyles of femur
Insertion: Posterior calcaneus via calcaneal tendon
Function: Plantar flexion
Soleus
Origin: Superior Tibia/fibula
Insertion: Posterior calcaneus via calcaneal tendon
Function: Plantar flexion
Tibalis Anterior
Origin: Lateral condyle and 2/3 of shaft
Insertion: Medial cuneiform and 1st metatarsal bone
Function: Dorsiflexion
Peroneus Longus
Origin: Upper portion of lateral fibula
Insertion: First metatarsal and meidal cuneiform
Function: Plantar flexion
Calcaneal tendon
Origin:
Insertion:
Function: Achilles Tendon
