Muscular System. Review Parts of a muscle Review.
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Transcript of Muscular System. Review Parts of a muscle Review.
Types of Contractions
• Isotonic– Concentric-muscle shortens– Eccentric- muscle lengthens
• Isometric- hold in a stationary position
Interactions of Skeletal Muscle
• Prime movers (agonist)- has responsibility for producing movement
• Antagonist- Moves opposite to movement• Synergist - help prime mover• Fixators- Immobilize bone that muscle are
moving around
Naming muscle
• Location- bone or body region associated• Shape- Deltoid (triangle)• Size- Gluteus Maximus (largest)• Direction of muscle fibers- rectus (straight),
oblique (right angles)• Number of origins- biceps, triceps• Location of attachment- sternocleidomastoid• Actions- flexor, extensor
Facial expression
• Frontalis• Platysma• Obicularis Oculi & Oris• Zygomaticus Major &minor• Levator labii superioris• Buccinator
Muscle of Mastication
• Lateral pterygoid– Forward sliding and side to side movement of the
mandible
Movement of Neck
• Sternocleidomastiod- Flexes and laterally rotates head
• Splenis capitis- extends head
Abdominal Wall
• Rectus Abdominis- sectioned (6 pack)• External Oblique- Sit up• Internal Oblique-same as external oblique• Transversus abdominis- compresses
abdominal contents
Shoulder and Back
• Deltoid- flap like a bird• Pectoralis Major- brings arms together• Serratus anterior- brings arms down and
forward• Latissimus dorsi- brings arms down• Trapezius- should shrugs
Lower Extremity
• Sartorius- Tailors Muscle• Adductor group- Groin muscles• Quadriceps femoris– Rectus femoris– Vastus lateralis– Vastus medials