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Muscles
Insertions, Origins, and Actions of select muscles
39
Anatomy
12th Grade
01/18/2012

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Cards

Term
Orbicularis oculi
Definition

Origin: frontal

Insertion: eyelids

Action: closes eye

Term
Orbicularis oris
Definition

Origin: maxilla, mandible

Insertion: lips

Action: closes, protrudes lips

Term
Buccinator
Definition
Origin: mandible
Insertion: maxilla
Action: retains mouth contents
Term
Masseter
Definition
Origin: maxilla
Insertion: mandible
Action: raises jaw, mastication
Term
Trapezius
Definition
Origin: occipital
Insertion: clavicle, scapula
Action: raises, adducts scapula
Term
Rhomboideus major
Definition
Origin: thoracic vertebrae
Insertion: scapula
Action: raises, adducts, retracts scapula
Term
Rhomboideus minor
Definition
Origin: thoracic vertebrae
Insertion: scapula
Action: raises, adducts, retracts scapula
Term
Serratus anterior
Definition
Origin: upper eight ribs
Insertion: scapula
Action: lowers, pulls scapula anteriorly
Term
Pectoralis minor
Definition
Origin: ribs 2-5
Insertion: scapula
Action: lowers, pulls scapula anteriorly
Term
Coracobrachialis
Definition
Origin: clavicle, scapula
Insertion: humerus
Action: flexes, adducts humerus
Term
Pectoralis major
Definition
Origin: clavicle, sternum
Insertion: humerus
Action: adducts, rotates arm medially
Term
Latissimus dorsi
Definition
Origin: ilium, ribs
Insertion: humerus
Action: adducts, rotates arm laterally
Term
Deltoid
Definition
Origin: clavicle, scapula
Insertion: humerus
Action: abducts upper arm
Term
Biceps brachii
Definition
Origin: scapula
Insertion: radius
Action: flexes elbow, supinates hand
Term
Brachialis
Definition
Origin: humerus
Insertion: ulna
Action: flexes elbow
Term
Brachioradialis
Definition
Origin: humerus
Insertion: radius
Action: flexes elbow
Term
Triceps brachii
Definition
Origin: scapula, humerus
Insertion: ulna
Action: extends elbow
Term
External oblique
Definition
Origin: last seven ribs
Insertion: linea alba, pelvis
Action: retains abdominal contents, flexes trunk laterally and anteriorly
Term
Internal oblique
Definition
Origin: pelvis
Insertion: last four ribs
Action: retains abdominal contents, flexes trunk laterally and anteriorly
Term
Transversus abdominis
Definition
Origin: lower six ribs, ilium
Insertion: linea alba and pubis
Action: retains abdominal contents, flexes trunk laterally and anteriorly
Term
Rectus abdominis
Definition
Origin: pubis
Insertion: xiphoid process, costal cartilages 5-7
Action: retains abdominal contents, flexes trunk laterally and anteriorly
Term
Psoas major
Definition
Origin: lumbar and low thoracic vertebrae
Insertion: femur
Action: flexes thigh
Term
Iliacus
Definition
Origin: ilium
Insertion: femur
Action: flexes thigh
Term
Gluteus maximus
Definition
Origin: sacrum, coccyx, ilium
Insertion: femur
Action: extends thigh, tilts pelvis
Term
Gluteus medius
Definition
Origin: ilium
Insertion: femur
Action: abducts, medially rotates thigh
Term
Gluteus minimus
Definition
Origin: ilium
Insertion: femur
Action: abducts, medially rotates thigh
Term
Tensor fasciae latae
Definition
Origin: ilium
Insertion: femur, tibia
Action: abducts, flexes, medially rotates thigh
Term
Adductor longus
Definition
Origin: symphysis pubis
Insertion: femur
Action: adducts, flexes, outrotates thigh
Term
Adductor magnus
Definition
Origin: pubis, ischium
Insertion: femur
Action: adducts, extends, medially rotates thigh
Term
Gracilis
Definition
Origin: pubis
Insertion: tibia
Action: adducts thigh, flexes knee and medially rotates leg
Term
Biceps femoris
Definition
Origin: ischium, femur
Insertion: tibia and fibula
Action: flexes knee, extends thigh
Term
Semitendinosus
Definition
Origin: ischium
Insertion: tibia
Action: flexes knee, extends thigh
Term
Semimembranosus
Definition
Origin: ischium
Insertion: tibia
Action: flexes knee, extends thigh
Term
Sartorius
Definition
Origin: ilium
Insertion: tibia
Action: flexes knee and thigh, abducts, outrotates thigh
Term
Quadriceps femoris (Vastus lateral, vastus medial, vastus interior, rectus femoris)
Definition
Origin: ilium, femur
Insertion: tibia
Action: extends shank at knee
Term
Tibialis anterior
Definition
Origin: tibia
Insertion: metatarsals
Action: dorsiflexes foot
Term
Peroneus longus
Definition
Origin: tibia, fibula
Insertion: metatarsals
Action: plantar-flexes and everts foot
Term
Gastrocnemius
Definition
Origin: femur
Insertion: calcaneus
Action: plantar-flexes foot, flexes knee
Term
Soleus
Definition
Origin: tibia, fibula
Insertion: calcaneus
Action: plantar-flexes foot
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