Skeletal Muscle Groups

1
Skeletal Muscle Groups
2
Head and Neck

• Facial muscles
• Orbicularis oculi circular muscle around the eye
• Orbicularis oris circular muscle around the
  mouth
• Zygomaticussmiling muscles
• Massetermastication
• Temporal mastication

3
Head and Neck

• Sternocleidomastoid flexes head
• Trapezius shrugs shoulders, extends head

4
Upper Extremities

• Pectoralis major flexes upper arm (chest muscle)
• Latissimus Dorsi extends upper arm (on back)
• Deltoid abducts upper arm
• Biceps Brachii flexes forearm
• Triceps Brachii extends forearm

5
Trunk/Torso

• Abdominals
• Rectus Abdominus (6 pack)
• External Oblique (R L flank)
• Internal Oblique
• Transverse Abdominus

6
Respiratory Muscles

• Intercostals (between each rib)
• Diaphragm

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Muscles that move lower extremities

• Gluteus Maximus extends thigh
• Adductor Muscles adducts thighs
• Hamstring Muscles
• Semimembraneous
• Semitendinosus Flexes Lower Leg
• Biceps Femoris

8
Quadriceps femoris

• Extends lower leg
• Rectus femoris
• Vastus Lateralis
• Vastus intermedius
• Vastus medialis

9
Muscles of lower leg

• Tibialis anterior dorsiflexes foot
• Gastrocnemius plantar flexes foot
• Peroneus Group flexes foot

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Types of Movements

• Flexion decreases the angle between 2 bones at
  the joint.. (Bending)
• Extension increases the angle between 2 bones at
  the joint(straightening)
• Abduction movement away from the midline
• Adduction Movement toward the midline

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Types of Movement

• Rotation movement around a longitudinal axis
• Hand positions that results from rotation of the
  forearm.
• Supination
• Pronation