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Muscular System Abigail Pratt P.4 (Names (Extensor Carpi Radialis, Flexor…
Muscular System Abigail Pratt P.4
Names
Extensor Carpi Radialis
Flexor Carpi Ulnaris
Latissimus Dorsi
Teres Major
Infraspinatus
Extensor Digitorum
External Oblique
Iliopsoas
Rectus Abdominus
Flexor Carpi Radialis
Brachioradialis
Tricep Brachii
Bicep Brachii
Serratus Anterior
Pectoralis major
Deltoid
Sternocleidomastoid
Adductor Longus
Sartorius
Gracilis
Rectus Femoris
Vastus Lateralis
Vastus Medialis
Bicep Femoris
Semitendinosus
Semimembranosus
Trapezius
Tibialis Anterior
Extensor Digitorm Longus
Fibularis Longus
Gastrocnemius
Soleus
Major Functions
Produce movement
Stabilize joints
Maintain posture and position
Generate heat
Types of muscle tissue
Cardiac Muscle Tissue
Only in the heart, striated, involuntary
Skeletal Muscle Tissue
Long, striated, voluntary
Smooth Muscle Tissue
Visceral, nonstriated, involuntary
Movement terminology
Abduction
Moving away from the body
Adduction
Moving towards the body
Pronation
Palm faces down
Supination
Palm faces up
Flexion
Decrease the angle of the joint
Extension
Increase the angle of the joint
Circumduction
Moving the limb in a circle
Depression
Movement inferiorly
Elevation
Movement superiorly
Retraction
Movement posteriorly along the transverse plan
Protraction
Movement anteriorly along the transverse plane
Rotation
Turning the bone on its long axis
Dorsiflexion
Flexes the foot towards the shin
Plantar Flexion
Flexes the foot away from the shin
Inversion
Turns foot medially
Eversion
Turns foot medially
Physiology
Sliding Filament Theory
Thin filaments slide past the thick ones so that the actin and myosin filaments overlap to a greater degree. Neither filament changes length.
Associated Disorders
Muscular Distrophy
A group of inherited muscle-destroying diseases that usually appear during childhood
Duchenne Muscular Distrophy
DMD, sex-linked recessive disease, almost exclusively found in men, diagnosed between ages 2 and 7. Caused by a defective dystrophin gene. No cure
Rigor Mortis
Muscles stiffen 3 to 4 hours after death, peaking at 12 hours. Stiffness gradually dissipates over the next 48 to 60 hours as muscle proteins break down.
Disuse Atrophy
Degeneration and loss of muscle mass as a result of immobilization