Transcript Skeletal Muscle Groups - Woodstown

Skeletal Muscle Groups
Muscles of the head and neck
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Frontal – raises eyebrows
Orbicularis oculi – closes eye
Orbicularis oris – puckering
Zygomaticus – smiling
Facial muscles contd.
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Masseter – closes jaw, elevates
mandible
Temporal – closes jaw
Sternocleidomastoid – rotation of
head/neck, flex neck on chest.
Trapezius – extends head backwards
and elevates the shoulders
Muscles of the upper extremity
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Pectoralis major – flexes and helps adduct
upper arm
Latissimus dorsi – extends and helps
adduct upper arm
Deltoid – abduct upper arm
Biceps brachii – primary flexor of forearm
Triceps brachii – extensor of elbow,
straightening, boxers muscle
Muscles of the trunk - ABs
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3 layers running in different directions
which leads to strength and support
On side
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External oblique – outermost layer
Internal oblique- middle layer
Transversus abdominis – innermost layer
Rectus abdominis – band of muscles running
down midline of abdomen from thorax to pubis
Ab muscles
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External oblique, internal oblique
and transversus abdominis all
compress the abdomen
Rectus abdominis – flexes trunk
Muscles that move the lower
extremities
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Iliopsoas – flexor of thigh or trunk, posture
Sartorius – flexes thigh and rotates lower
leg
Gluteus maximus – extensor of the thigh,
supports torso in erect position
Adductor muscles- found on inner thigh,
adducts thigh
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Adductor longus, gracilis, pectineus
Upper leg muscles
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Hamstring muscles –
flexes knee
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Semimembranosus
Semitendinosus
Biceps femoris
Quadriceps femoris – covers
upper thigh, extends lower leg
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Rectus femoris
Vastus lateralis, intermedius, medialis
Lower leg muscles
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Tibialis anterior – dorsiflexes foot
Gastrocnemius – (calf muscle)
plantar flexion of foot (toe dancers
muscle)
Peroneus group () – plantar flex foot
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Peroneus longus – support arch in foot
Peroneus brevis
Soleus