The Muscular System outline SP17 (1)

Delayed onset muscle soreness o 12 to 48 hours after

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Delayed onset muscle soreness o 12 to 48 Hours after strenuous exercise o stiffness, tenderness and swelling due to microscopic cell damage Rigor mortis is a state of muscular rigidity that begins 3-4 hours after death and lasts about 24 hours o After death, Ca+2 ions leak out of the SR and allow myosin heads to bind to actin
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o Since ATP synthesis has ceased, crossbridges cannot detach from actin until proteolytic enzymes begin to digest the decomposing cells. Regeneration of Muscle o Skeletal muscle fibers cannot divide after 1st year growth is enlargement of existing cells repair satellite cells & bone marrow produce some new cells if not enough numbers---fibrosis occurs most often o Cardiac muscle fibers cannot divide or regenerate all healing is done by fibrosis (scar formation) o Smooth muscle fibers (regeneration is possible) cells can grow in size (hypertrophy) some cells (uterus) can divide (hyperplasia) new fibers can form from stem cells in BV walls Aging and Muscle Tissue o Skeletal muscle starts to be replaced by fat beginning at 30 "use it or lose it" Slowing of reflexes & decrease in maximal strength IV. Superficial Muscles Diagram1 (Anterior Superficial) Diagram2 (Anterior Trunk) Diagram3 (Superficial Facial) Diagram4 (Posterior Superficial) Diagram5 (Posterior Trunk) Anterior
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Frontailis Orbicularis oculi Temporalis Zygomaticus Masster Orbicularis oris Platysma Sternohyoid Sternocleidomastoid Deltoid Pectoralis minor Pectoralis major Serratus anterior Intercostals Rectus abdominis External oblique Internal Oblique Transverse abdominis Triceps brachii Biceps brachii Brachialis Brachioradialis Flexor carpi radialis Palmaris longus lliopsoas Pectineus Tensor fasciae latae Sartorius Adductor longus Gracilis Rectus femoris Vastus lateralis Vastus medialis Tbialis anterior Posterior Occipitalis Flexor carpi ulnaris
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Trapezius Deltoid Infraspinatus Teres major Rhomboid Latissimus dorsi Triceps brachii Extensor carpi ulnaris Extensor carpi radialis Extensor digitorum Gluteus medius Gluteus maximus Biceps femoris Semitendinosus Semimembranosus Gastrocnemius Soleus Helpful Activities to do after you finish reading this chapter Hamstring Injury Effect of Botulism Toxin John wiley o Muscle Contraction
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  • Fall '10
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  • Gross Anatomy of Muscle Organ

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