Muscle Actions Flashcards
buccinator
- compresses cheeks
- controls food during mastication
- sucking & whistling
corrugator supercili
- “anger wrinkles”
- common area for botox injections
orbicularis oculi
- squinting motion
what are our smiling muscles?
- risorius (pulls corner of mouth)
- zygomaticus major & minor (pulls mouth corners)
- levator labii superioris (pulls up corner
- levator anguli oris (elevates angle of mouth)
masseter
closes & protracts jaw
temporalis
closes & retracts jaw
lateral pterygoid
side to side motions
medial pterygoid
grinding motion
sternocleidomastoid
- anterior flexion
- rotation
- lateral flexion
splenius capitis
- extension
- lateral flexion
- rotation
splenius cervicis
- extension
- lateral flexion
- rotation
trapezius
- extension of neck and scapula
what muscles COMPRESS the abdominal wall?
- rectus abdominus
- transverse abdominus
- external/internal obliques
what FLEXES the lumbar vertebrae?
- rectus abdominus
- Iliopsoas
what EXTENDS the lumbar vertebrae?
- latissimus dorsi
- erector spinae complex
what ROTATES the trunk?
external and internal obliques
what ADDUCTS the humerus?
- coracobrachialis
- teres major
- latissimus dorsi
- pectoralis major
what ABDUCTS the humerus?
- deltoid
- supraspinatus
what FLEXES the humerus?
- coracobrachilis
- pectoralis major
- deltoid (anterior)
what EXTENDS the humerus?
- deltoid (posterior)
- latissimus dorsi
what muscles FLEXES the elbow?
- biceps brachii
- brachialis
- brachioradialis
what muscles EXTENDS the elbow?
- triceps brachii
- anconeus
what are some of the pronators & supinators?
- pronator teres
- pronator quadratus
- supinator
flexion of wrist
- flexor digitorum superficialis
- flexor carpi ulnaris
- flexor carpi radialis
extension of wrist
- extensor carpi ulnaris
- extensor carpi radialis longus
adduction of wrist
- flexor carpi ulnaris
- extensor carpi ulnaris
abduction of wrist
- flexor carpi radialis
- extensor carpi radialis longus
extension of fingers
extensor digitorium
flexion of fingers
flexor digitorum superficialis
thumb movement
- abductor pollicis longus/brevis
- extensor pollicis longus/brevis
- flexor pollicis longus
hip flexors
- iliopsoas
- pectineus
- rectus femoris
- sartorius
hip extensors
- gluetus maximus
- biceps femoris
- semitendinosus
- semimembranosus
hip (thigh) abductors
- gluteus medius
- tensor fasciae latae
- sartorius
hip (thigh) adductors
- adductor longus/magnus
- gracilis
- pectineus
knee flexion
- hamstrings
- semitendinosus. semimembranosus, sartorius, popliteus
knee extension
- rectus femoris
- vastus lateralis/medialis/intermedius
dorsiflexion of ankle
- tibialis anterior
- extensor digitorum longus
plantar flexion of foot
- gastrocnemius
- soleus
- peroneus (fibularis) longus
