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Muscular System

This informative piece delves into the muscular system, focusing on the two primary types of muscle contractions: isometric and isotonic. Isometric contractions develop tension without changing muscle length, while isotonic contractions include concentric (shortening) and eccentric (lengthening) movements. Furthermore, we explore skeletal muscles responsible for movement in various regions, including the head, neck, torso, shoulders, and limbs. Detailed insights on muscle groups like those for facial expression, mastication, and movement of the hip and knee are provided, highlighting their anatomical significance and functional roles.

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Muscular System

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  1. Muscular System

  2. Isometric & Isotonic Contractions Isometric muscle contraction • It develops tension without changing length Isotonic muscle contraction Concentric: • Tension development while shortening Eccentric: • Tension development while lengthening

  3. The Muscular System I Skeletal Muscles 1 Muscles That Move the Head, Neck, and Face 1- Muscles of Facial Expression 2- Muscles of Mastication 3- Muscle of Head and Neck Muscles That Move the Trunk 1- Muscle of the Thorax 2- Muscles of the Abdominal Wall 3- Postural Muscles of the Back Muscles That Move the Shoulder 1- Muscles of the Shoulder 2- Rotator Cuff Muscle

  4. Muscles That Move the Forearm and Wrist Muscles that Move the Wrist and Digits Muscles That Move the Hip and Knee Muscles of the Pelvic Girdle Muscles of the Thigh Muscles That Move the Ankle and Foot

  5. Muscles that Move the Head, Neck, and Face 1- Muscles of facial expression (they tense the skin and produce the facial expressions of different emotional states). 2- Muscles of mastication (they move the jaw for chewing). 3- Muscles that move the head and neck.

  6. Palmaris longus

  7. Muscles That Move the Hip and Knee Muscles of the Thigh Posterior view Hamstrings Group They flex the leg at knee Biceps femoris Semitendinous Semimembranous Left Right

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