Studied by 238 peopleBuccinator
Origin: maxilla & mandible
Insertion: orbicularis oris
Actions: retracts angle of mouth, chewing
Orbicularis oris
Origin: maxilla & mandible
Insertion: skin around mouth
Actions: protrudes (purses) lips
Zygomaticus minor
Origin: zygomatic bone
Insertion: skin of superior lip
Actions: elevates corner of mouth (smile)
Zygomaticus major
Origin: zygomatic bone
Insertion: corner of mouth
Actions: draws angle of mouth upwards (smile)
Frontal belly of epicranius (frontalis)
Origin: frontal bone
Insertion: epicranial aponeurosis
Actions: wrinkles forehead & raises eyebrows
Occipital belly of epicranius (occipitalis)
Origin: occipital bone
Insertion: epicranial aponeurosis
Actions: retracts scalp
Orbicularis oculi
Origin: frontal & maxillary bones
Insertion: eyelids
Actions: closes eye (blink)
Temporalis
Origin: temporal fossa
Insertion: coronoid process of mandible
Actions: elevates mandible
Masseter
Origin: zygomatic arch
Insertion: mandible
Actions: elevates mandible
Mylohyoid
Origin: mandible
Insertion: hyoid
Actions: elevates hyoid & floor of mouth
Thyrohyoid
Origin: thyroid cartilage
Insertion: hyoid bone
Actions: depresses hyoid bone & elevates larynx
Sternothyroid
Origin: manubrium of sternum
Insertion: thyroid cartilage
Actions: depresses larynx
Sternohyoid
Origin: manubrium & clavicle
Insertion: hyoid bone
Actions: depresses hyoid
Omohyoid
Origin: scapula
Insertion: hyoid bone
Actions: depresses hyoid
Sternocleidomastoid
Origin: manubrium & clavicle
Insertion: mastoid process
Actions: rotates & flexes head
Erector Spinae Group
Origin: iliac crest, sacrum & vertebrae
Insertion: ribs. vertebrae & mastoid process of temporal bone
Actions: extends head, neck & vertebral column
Internal intercostal
Origin: rib below
Insertion: rib above
Actions: depresses ribs during exhalation
External intercostal
Origin: rib above
Insertion: rib below
Actions: elevates ribs during inhalation
Diaphragm
Origin: inferior internal ribs 7-12
Insertion: central tendon
Actions: expands thoracic cavity
Transversus abdominis
Origin: iliac crest & cartilage of lower 6 ribs
Insertion: linea alba
Actions: compresses abdomen
Internal abdominal oblique
Origin: iliac crest & thoracolumbar fascia
Insertion: linea alba & lower 4 ribs
Actions: compresses abdomen; flexes & rotates vertebral column
External abdominal oblique
Origin: lower eight ribs
Insertion: linea alba & iliac crest
Actions: compresses abdomen; flexes & rotates vertebral column
Rectus abdominis
Origin: pubis
Insertion: cartilage of ribs 5-7 & xiphoid process
Actions: flexes vertebral column & compresses abdomen
Serratus Anterior
Origin: upper ribs
Insertion: medial border of scapula
Actions: rotation of scapula
Pectoralis Minor
Origin: upper ribs
Insertion: coracoid process of scapula
Actions: depresses scapula
Rhomboid minor
Origin: spinous process of C7-T1
Insertion: medial border of scapula superior to spine
Actions: adducts scapula
Rhomboid major
Origin: spines of thoracic vertebrae
Insertion: medial border of scapula
Actions: adducts scapula
Trapezius
Origin: occipital bone; spinous process of C7-T12
Insertion: clavicle; acromion process & spine of scapula
Actions: elevate, superiorly rotate, retract & depress scapula
Latissimus dorsi
Origin: spinous process of T7 - T12, ribs 8 -12,
iliac crest & thoracolumbar fascia
Insertion: intertubercular groove of humerus
Actions: adducts & medially rotates humerus
Pectoralis major
Origin: sternum & clavicle
Insertion: intertubercular groove of humerus
Actions: flexes, adducts & medially rotates humerus
Coracobrachialis
Origin: coracoid process of scapula
Insertion: shaft of humerus
Actions: flexes & adducts humerus
Deltoid
Origin: acromion & spine of scapula; clavicle
Insertion: deltoid tuberosity of humerus
Actions: abducts, flexes, rotates & extends arm
Teres minor
Origin: lateral border of scapula
Insertion: greater tubercle
Actions: adducts & laterally rotates arm
Infraspinatus
Origin: infraspinatus fossa
Insertion: greater tubercle
Actions: adducts & laterally rotates of humerus
Supraspinatus
Origin: supraspinous fossa
Insertion: greater tubercle
Actions: abducts humerus
Brachioradialis
Origin: supracondylar ridge of humerus
Insertion: styloid process of radius
Actions: flexes forearm
Brachialis
Origin: shaft of humerus
Insertion: tuberosity & coronoid process of ulna
Actions: flexes forearm
Biceps brachii, short head
Origin: coracoid process of scapula
Insertion: radial tuberosity
Actions: flexes forearm; supinates forearm
Biceps brachii, long head
Origin: supraglenoid tubercle of scapula
Insertion: radial tuberosity
Actions: flexes forearm & arm; supinates forearm
Triceps brachii, medial head
Origin: posterior humerus (distal)
Insertion: olecranon of ulna
Actions: extends forearm
Triceps brachii, lateral head
Origin: posterior humerus (proximal)
Insertion: olecranon of ulna
Actions: extends forearm
Triceps brachii, long head
Origin: infraglenoid tubercle of scapula
Insertion: olecranon of ulna
Actions: extends forearm; extends & adducts arm
Flexor digitorum superficialis
Origin: medial epicondyle of humerus & coronoid
process of ulna
Insertion: middle phalanges (2-5)
Actions: flexes wrist & fingers
Pronator teres
Origin: medial epicondyle of humerus
Insertion: shaft of radius
Actions: pronates forearm
Flexor carpi radialis
Origin: medial epicondyle of humerus
Insertion: 2nd & 3rd metacarpals
Actions: flexes wrist & abducts hand
Palmaris longus
Origin: medial epicondyle of humerus
Insertion: palmar aponeurosis
Actions: flexes wrist weakly
Flexor carpi ulnaris
Origin: medial epicondyle of humerus & upper
ulna
Insertion: pisiform, hamate & 5th metacarpal
Actions: flexes wrist & adducts hand
Extensor digitorum
Origin: lateral epicondyle of humerus
Insertion: digits 2-5
Actions: extends fingers 2-5 & wrist
Extensor carpi ulnaris
Origin: lateral epicondyle of humerus & ulna
Insertion: 5th metacarpal
Actions: extends wrist & adducts hand
Sartorius
Origin: anterior superior iliac spine
Insertion: tibial tuberosity
Actions: flexes & laterally rotates thigh; flexes & medially rotates leg
Gracilis
Origin: inferior ramus & body of pubis
Insertion: medial tibia
Actions: adducts & flexes thigh; flexes leg
Tensor fasciae latae
Origin: iliac crest
Insertion: iliotibial band
Actions: abducts thigh & medially rotates thigh
Gluteus medius
Origin: iliac crest
Insertion: greater trochanter of femur
Actions: abducts & medially rotates thigh
Gluteus maximus
Origin: iliac crest, sacrum & coccyx
Insertion: fascia lata & proximal femur
Actions: extends & laterally rotates thigh
Semimembranosus
Origin: ischial tuberosity
Insertion: medial condyle of tibia
Actions: flexes leg, extends thigh & medially rotates leg
Semitendinosus
Origin: ischial tuberosity
Insertion: medial condyle of tibia
Actions: flexes leg & extends thigh
Biceps femoris, short head
Origin: linea aspera (femur)
Insertion: head of fibula, lateral condyle tibia
Actions: flexes leg, laterally rotates leg
Biceps femoris, long head
Origin: ischial tuberosity
Insertion: head of fibula, lateral condyle tibia
Actions: extends thigh, flexes leg, laterally rotates leg
Vastus intermedius
Origin: femur
Insertion: tibial tuberosity
Actions: extends leg
Vastus medialis
Origin: intertrochanteric line & linea aspera of
femur
Insertion: tibial tuberosity
Actions: extends leg
Vastus lateralis
Origin: greater trochanter & linea aspera of femur
Insertion: tibial tuberosity
Actions: extends leg
Rectus femoris
Origin: iliac spine
Insertion: tibial tuberosity
Actions: flexes thigh & extends leg
Soleus
Origin: proximal fibula & tibia
Insertion: calcaneus via calcaneal tendon (Achilles tendon)
Actions: plantar flexes foot
Gastrocnemius
Origin: condyles of femur
Insertion: calcaneus via calcaneal tendon (Achilles tendon)
Actions: plantar flexes foot & flexes leg
Tibialis anterior
Origin: proximal tibia
Insertion: medial cuneiform & first metatarsal
Actions: dorsiflexes & inverts foot
Fibularis longus ("Peroneus longus")
Origin: fibula & lateral condyle of tibia
Insertion: 1st metatarsal & medial cuneiform
Actions: plantar flexes (weakly) & everts foot
Note 
Flashcard (70)