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TERMS RELATING TO MUSCLES
• Muscles attach to at least two bones.
• Origin-the attachment of a muscle to the less
movable bone. Usually near the axial skeleton.
• Insertion-the attachment of a muscle to the
more movable bone. Usually near the
appendicular skeleton.
• Action-the movement produced by a muscle.
Movements at Muscles
• Movements require at least two muscles that
work together.
• Prime Mover-the muscle that produces a
desired action. This muscle contracts.
• Antagonist-the muscle that relaxes during a
muscle contraction.
• Synergists-steady the movements of prime
mover.
(a)
(b)
(g)
(f)
(a) Circular
(orbicularis oris)
(c)
(b) Convergent
(pectoralis major)
(e)
(c) Parallel
(sartorius)
(d)
(e) Bipennate
(rectus femoris)
(f) Fusiform
(biceps brachii)
(d) Unipennate
(extensor
digitorum
longus)
(g) Multipennate
(deltoid)
Head
Temporalis
Masseter
Shoulder
Trapezius
Deltoid
Arm
Triceps brachii
Biceps brachii
Brachialis
Forearm
Pronator teres
Brachioradialis
Flexor carpi radialis
Palmaris longus
Pelvis/thigh
Iliopsoas
Pectineus
Thigh
Rectus femoris
Vastus lateralis
Vastus medialis
Leg
Fibularis longus
Extensor digitorum longus
Tibialis anterior
Facial
Epicranius, frontal belly
Orbicularis oculi
Zygomaticus
Orbicularis oris
Neck
Sternohyoid
Platysma
Sternocleidomastoid
Thorax
Pectoralis minor
Serratus anterior
Pectoralis major
Intercostals
Abdomen
Rectus abdominis
Internal oblique
Transversus abdominis
External oblique
Thigh
Tensor fasciae latae
Sartorius
Adductor longus
Gracilis
Leg
Gastrocnemius
Soleus
Arm
Triceps brachii
Brachialis
Forearm
Brachioradialis
Extensor carpi
radialis longus
Flexor carpi ulnaris
Extensor carpi
ulnaris
Extensor digitorum
Iliotibial tract
Leg
Gastrocnemius
Soleus
Fibularis longus
Calcaneal
(Achilles) tendon
Neck
Epicranius, occipital belly
Sternocleidomastoid
Trapezius
Shoulder
Deltoid
Infraspinatus
Teres major
Rhomboid major
Latissimus dorsi
Hip
Gluteus medius
Gluteus maximus
Thigh
Adductor magnus
Hamstrings:
Biceps femoris
Semitendinosus
Semimembranosus