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44 terms

Muscles

STUDY
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Sternocleidomastoid
Prime mover of flexion & lateral rotation of the head
Scalenes
Elevates first two ribs
synergist of lateral flexion of vertebral column and inhalation
Erector spinae
Prime mover of neck and trunk extension & lateral flexion of vertebral column
Quadratus lumborum
Prime mover of trunk extension, lateral flexion of vertebral column & elevation of pelvis
Pectoralis major
Prime mover of shoulder flexion, adduction & medial rotation
Pectoralis minor
With ribs fixed, draws scapula forward and downward
Trapezius
Prime mover of neck extension & scapular sabilisation, elevation, retraction & rotation
Latissimus dorsi
Prime mover of shoulder extension, adduction & medial rotation
Synergist of trunk rotation and respiration
Deltoid
Prime mover of shoulder abduction, flexion, extension, medial & lateral rotation
Corachobrachialis
Prime mover of shoulder flexion & adduction
Supraspinatus
Initiates shoulder abduction
Infraspinatus
Prime mover of lateral shoulder rotation
Synergist of shoulder abduction
Teres minor
Prime mover of lateral shoulder rotation
Synergist of shoulder extension & abduction
Subscapularis
Prime mover of medial shoulder rotation
Biceps brachii
Prime mover of elbow flexion & forearm supination
Synergist of shoulder flexion
Brachioradialis
Synergist of elbow flexion & forearm supination
Triceps brachii
Prime mover of elbow extension
Synergist of shoulder extension
Diaphragm
Prime mover of inspiration; flattens on contraction
External intercostals
Pulls ribs toward on another to elevate rib cage (aids in inspiration)
Synergist of diaphragm
Internal intercostals
Draws ribs together and depress rib cage (aids in forced exhalation)
Antagonist to external intercostals
Rectus abdominus
Prime mover of trunk flexion
Synergist of rotation of lumbar region of vertebral column
External obliques
Prime mover of trunk rotation & lateral flexion
Synergist of trunk flexion & abdominal wall compression
Internal obliques
Prime mover of trunk rotation & lateral flexion
Synergist of trunk flexion & abdominal wall compression
Tranvsersus abdominus
Compresses abdominal contents (core)
Levator ani
Supports and maintains position of pelvic viscera, resists downwards action of coughs, vomiting and lifts anal canal after defecation
External anal sphincter
Constricts anus
Pectineus
Prime mover of hip adduction
Synergist of hip flexion & medial rotation
Ilio-psoas
Prime mover of hip flexion
Synergist of lateral flexion of vertebral column
Gluteus maximus
Prime mover of hip extension & lateral rotation
Gluteus medius
Prime mover of hip abduction & medial rotation
Rectus femoris
Prime mover of knee extension
Synergist of hip flexion
Vastus lateralis
Prime mover of knee stabilisation and flexion
Vastus medialis
Prime mover of knee extension
Vastus intermedius
Prime mover of knee extension
Sartorius
Synergist of hip flexion, abduction, & lateral rotation & knee flexion
Adductor longus
Prime mover of hip adduction
Synergist of hip flexion & medial rotation
Adductor magnus
Prime mover of hip adduction
Synergist of hip flexion, extension & medial rotation
Gracilis
Prime mover of hip adduction
Synergist of medial hip rotation & knee flexion
Biceps femoris
Prime mover of hip extension & knee flexion
Synergist of lateral hip rotation
Semimembranosus
Prime mover of hip extension & knee flexion
Synergist of medial hip rotation
Semitendinosus
Prime mover of hip extension & knee flexion
Synergist of medial hip rotation
Gastrocnemius
Prime mover of plantar flexion of the ankle
Synergist of knee flexion
Soleus
Prime mover of plantar flexion of the ankle
Tibialis anterior
Prime mover of dorsiflexion of the ankle