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Name the action of the frontalis?
draws scalp forward, raises eyebrows, wrinkles forehead
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Action of occipitails?
draws scalp backward
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Action of orbicularis oris?
compresses and purses lips (kiss muscle)
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Action of orbicularis oculi?
closes eye (blink muscle)
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Action of zygomaticus?
pulls corners of mouth superiorly (smiling muscle)
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temporalis?
- parietal and frontal
- bones
- coronoid process of
- mandible
- elevates and retracts
- mandible
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Masseter?
- zygomatic arch
- angle and ramus of
- mandible
- elevates and
- protracts mandible;
- jaw closure
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sternocleideomastiod?
- sternum and clavicle
- mastoid process of
- temporal bone
- Oppisite side head rotation
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External intercostals
elevates ribs during normal inspiration
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internal intercostals
depresses ribs during forced exhalation; antagonist to external intercostals
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diaphragm
contraction depresses(flattens) diaphragm and expands the thoracic cavity during normal inspiration
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external obliques
- both sides: flexes vertebral column & compresses
- abdominal wall
- one side: lateral flexion of vertebral column
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internal obliques
- both sides: flexes vertebral column & compresses
- abdominal wall
- one side: lateral flexion of vertebral column
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rectus abdominis
- flexes vertebral column & compresses abdominal
- wall
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transversus
abdominis
- both sides: flexes vertebral column & compresses
- abdominal wall
- one side: lateral flexion of vertebral column
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trapezius
- superior: elevates clavicle; adducts rotates, elevates and
- inferior: depresses scapula; extends head
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levator scapulae
elevates scapula
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serratus anterior
protracts & stabilizes scapula
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pectoralis minor
protracts and depresses scapula
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supraspinatus
stabilize and rotate glenohumeral joint
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infraspinatus
stabilize and rotate glenohumeral joint
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subscapularis
stabilize and rotate glenohumeral joint
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teres minor
stabilize and rotate glenohumeral joint
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teres major
extends, adducts, and medially rotates arm
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latissimus dorsi
- extends, adducts, and medially rotates arm; draws
- arm inferiorly and posteriorly
- (swimming, climbing rope, hammering)
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deltoid
abducts, flexes, extends, and rotates arm
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pectoralis major
flexes, adducts, and medially rotates arm
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rhomboid major
- elevates and retracts scapula; rotates scapula
- inferiorly
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rhomboid minor
- elevates and retracts scapula; rotates scapula
- inferiorly
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biceps brachii
- Proximal attachement of long head supraglenoid tubrecle
- Proximal attachement of shorthead coracoid process of scapula
- Ditsal attachement for both Radail tuberosity
- flexes arm (glenohumeral joint)flexes and supinates forearm(elbow joint);
- [lifts radius]
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coracobrachialis
- proximal attachement coracoid process of scapula
- Distal attachement middle medial shaft
- of humerus
- adducts and flexes arm (glenohumeral joint)
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brachialis
- Proximal attachement distal, anterior
- surface of humerus
- Distal attachement coronoid process of
- ulna
- flexes forearm(elbow joint) [lifts ulna]
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brachioradialis
- Proximal attachement lateral humerus
- Distal attachement styloid process of
- radius
- flexes forearm
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triceps brachii
(long, lateral, and medial heads)
- Proximal attachement of long head infraglenoid tubercle
- Proximal attachemnet of lateral head posterior shaft of humerus
- Proximal attachement of medial head
- posterior shaft of humerus distal to radial groove
- Distal attachment for all olecranon process of ulna
- extends forearm and assists in arm
- adduction
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pronator teres
pronates hand
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flexor carpi radialis
flexes wrist and abducts hand
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palmaris longus
weak wrist flexor; tenses fascia of palm
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flexor carpi ulnaris
flexes wrist and adducts hand
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flexor digitorum superficialis
flexes proximal interphalangeal joint
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flexor digitorum profundus
flexes wrist
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sartorius
- Proximal anterior superior
- iliac spine
- Distaltibial tuberosity, medial side
- flexes, abducts, and laterally rotates thigh; flexes leg and rotates leg medially(sitting crosslegged on floor)
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rectus femoris
- Proximalanterior inferior iliac spine
- Distal anterior inferior iliac spine
- Distal patella via quadriceps tendon and then tibial tuberosity via patellar ligament
- extends leg; flexes thigh
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vastus lateralis
- distal patella via quadriceps tendon and then tibial tuberosity via patellar ligament
- extends leg
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Vastus Intermmedius
- distal patella via quadriceps tendon and then tibial tuberosity via patellar ligament
- extends leg
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vastus medialis
- distal patella via quadriceps tendon and then tibial tuberosity via patellar ligament
- extends leg
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iliacus
- proximal iliac fossa
- Distal lesser trochanter of femur
- flexes thigh
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psoas major
- proximal T12-L5 vertebrae
- distal lesser trochanter of femur
- flexes thigh
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pectineus
adducts thigh; flexes (weak) thigh
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adductor longus
adducts thigh; flexes(weak) thigh
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adductor magnus
adducts thigh; flexes or extends and laterally rotates thigh depending on starting position
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adductor brevis
adducts thigh
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gracilis
- Proximal inferior ramus and body of pubis
- distal upper medial surface of tibia
- adducts & flexes (weak) thigh; flexes leg
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semitendinosus
- proximal ischial tuberosity
- distal proximal medial surface of tibia
- extends thigh & flexes leg; medially rotates leg
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semimembranosus
- proximal ischial tuberosity
- distal medial condyle of tibia
- extends thigh & flexes leg; medially rotates leg
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biceps femoris
• long head
• short head
- Proximal long head: ischial tuberosity
- short head: linea aspera of femur
- distal head of fibula
- extends thigh; flexes and laterally rotates leg
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tensor fascia latae
- proximal iliac crest & anterior superior iliac spine
- distal iliotibial band
- abducts thigh; medially rotates thigh
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gluteus maximus
- proximal iliac crest, sacrum, coccyx
- distal iliotibial tract of tensor fascia lata; linea aspera of femur
- extends thigh;laterally rotates thigh
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gluteus medius
- proximal iliac crest
- distal greater trochanter of femur
- abducts thigh; medially rotates thigh
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gluteus minimus
- proximal lateral surface of ilium
- distal greater trochanter of femur
- abducts thigh;medially rotates thigh
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piriformis
- proximal anterolateral surface of sacrum
- distal greater trochanter of femur
- laterally rotates thigh
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tibialis anterior
- proximal lateral condyle and proximal shaft of tibia
- distal metatarsal I and first (medial) cuneiform
- dorsiflexes foot; inverts foot
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extensor digitorum longus
extends toes 2-5;dorsiflexes foot
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extensor hallucis longus
extends great toe; dorsiflexes foot
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fibularis (peroneus) longus
everts foot; weak plantar flexor
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fibularis (peroneus) brevis
everts foot; weak plantar flexor
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gastrocnemius
- proximallateral and medial condyles of femur
- distalcalcaneus via Achilles (calcaneal) tendon
- plantar flexes foot and flexes leg
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soleus
- proximal head and proximal shaft of fibula; medial border of tibia
- distal calcaneus via Achilles (calcaneal) tendon
- plantar flexes foot
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tibialis posterior
plantar flexes foot; inverts foot
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flexor digitorum longus
plantar flexes foot;flexes toes 2-5
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flexor hallucis longus
- plantar flexes foot; flexes joints of great
- toe
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