Download Skeletal Muscle Groups

Skeletal Muscle Groups
Head and Neck
 Facial muscles
– Orbicularis oculi= circular muscle around the
eye
– Orbicularis oris= circular muscle around the
mouth
– Zygomaticus=smiling muscles
– Masseter=mastication
– Temporal= mastication
Head and Neck
 Sternocleidomastoid: flexes head
 Trapezius: shrugs shoulders, extends head
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
Trunk/Torso
 Abdominals:
– Rectus Abdominus (6 pack)
– External Oblique (R & L flank)
– Internal Oblique
– Transverse Abdominus
Respiratory Muscles
 Intercostals (between each rib)
 Diaphragm
Muscles that move lower
extremities
 Gluteus Maximus: extends thigh
 Adductor Muscles: adducts thighs
 Hamstring Muscles:
– Semimembraneous
– Semitendinosus
– Biceps Femoris
Flexes Lower Leg
Quadriceps femoris
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Extends lower leg
Rectus femoris
Vastus Lateralis
Vastus intermedius
Vastus medialis
Muscles of lower leg
 Tibialis anterior: dorsiflexes foot
 Gastrocnemius: plantar flexes foot
 Peroneus Group: flexes foot
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
Types of Movement
Rotation: movement around a longitudinal
axis
Hand positions that results from rotation of the
forearm.
Supination
Pronation