55 terms

65 Essential Muscles

STUDY
PLAY

Terms in this set (...)

Epicranius
(Frontal belly)
(occipital belly)
-raises eyebrows
-fixes aponeurosis and pulls scalp posteriorly
Orbicularis oculi
-closes eyes
Orbicularis oris
-closes lips
zygomaticus major and minor
-raises lateral corners of mouth upwards
(smiling)
Buccinator
-compresses cheek
Masseter
-prime mover of jaw closure
Temporalis
-closes jaw
Medial pterygoid
-In conjunction with lateral pterygoid, aids in grinding movements of teeth
Lateral pterygoid
-Aids in grinding movements of teeth
Platysma
-tenses skin of neck
sternocleidomastoid
-flexion of neck
-rotates head towards shoulder on opposite side
scalenes
(anterior)(middle)(posterior)
-elevates ribs 1 and 2
stylohyoid
-elevates and retracts hyoid bone
Pectoralis major
-prime mover of arm flexion; adducts, medially rotates arm
Deltoid
-acting as a whole: prime mover of arm abduction
pectoralis minor
-With ribs fixed, draws scapula forward and inferiorly
external intercostals
-pulls ribs toward one another to elevate rib cage
internal intercostals
-draws ribs together to depress rib cage
diaphragm
-prime mover of inspiration flattens on contraction
rectus abdominis
-flexes and rotates, vertebral column
external oblique
-compresses abdominal wall
-trunk rotation and lateral flexion
internal oblique
-compresses abdominal wall
-trunk rotation and lateral flexion
Transverse abdominis
-compresses abdominal contents
Latissimus dorsi
-Prime mover of arm extension; adducts and medially rotates arm.
Infraspinatus
-lateral rotation of arm
Teres minor
-lateral rotation of arm
Teres major
-Extends, medially rotates, and adducts arm
Supraspinatus
-initiates abduction of arm
Rhomboids (minor)(major)
-stabilizes scapulae
Triceps brachii
-powerful forearm extensor
Biceps brachii
-flexion (powerful) and supination of forearm
Brachioradialis
-synergist in forearm flexion
Brachialis
-flexor of forearm
Pronator teres
-pronate forearm
flexor carpi radialis
-powerful flexor and abducts the hand
flexor carpi ulnaris
-flexes and adducts hand
Extensor carpi radialis longus
extends and abducts hand
Extensor digitorum
-prime mover of finger extension
Extensor carpi ulnaris
-extends and adducts hand
Iliopsoas
-flex trunk at hip joint, flex thigh; lateral flexion of vertebral column
adductor (longus)
-adduct and medially rotate and flex thigh
gracilis
-adducts thigh; flexes and medially rotates leg
rectus femoris
-extends leg and flexes thigh
vastus lateralis
-extends leg and stabilizes knee
vastus medialis
-extends leg and stabilizes patella
tensor fasciae latae
-steadies trunk
gluteus maximus
-powerful thigh extensor
gluteus medius
-abducts and medially rotates thigh
biceps femoris
-extends thigh and flexes keg
semitendinosus
-extends thigh and flexes leg
semimembranosus
-extends thigh and flexes leg
fibularis (peroneus) longus
-plantar flexes and everts foot
Extensor digitorum longus
-prime mover of toe extension
gastronemius
-plantar flexes foot
soleus
-plantar flexion
YOU MIGHT ALSO LIKE...
STUDY GUIDE