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Muscular System. Vocabulary. bi- two -ia condition of -lysis destruction, dissolve myo- muscle -plegia paralysis tri- three tendo- tendon para- lower half fasci- fibrous band Carp – wrist. ad- to, toward or near ab- from, away circum- around

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Presentation Transcript
vocabulary
Vocabulary

bi- two

-ia condition of

-lysis destruction, dissolve

myo- muscle

-plegia paralysis

tri- three

tendo- tendon

para- lower half

fasci- fibrous band

Carp – wrist

slide3
ad- to, toward or near

ab- from, away

circum- around

inter- between, among

general info
General Info
  • Consists of 650 muscles
  • Muscles are bundles muscle fibers held together by connective tissue
properties
Properties
  • Excitability
    • Ability to respond to a stimulus such as a nerve impulse
  • Extensibility
    • Ability to be stretched
  • Elasticity
    • Allows the muscle to return to its original shape after it has contracted or stretched
slide6
●Contractibility -Muscle fibers stimulated by nerves contract or become shorter and thicker which causes movement
types of muscles
Types of Muscles
  • Skeletal
    • Attached to bones and causes movement
cardiac muscle
Cardiac Muscle
  • Found only in the heart
  • Contracts to circulate blood
visceral muscle
Visceral Muscle
  • Also called smooth
  • Found in all internal organs
functions of muscles
Functions of Muscles
  • Attaches to bones to provide voluntary movement
  • Produces heat and energy
  • Helps maintain posture
  • Protects internal organs
tendons
Tendons
  • Strong, tough, connective tissue
  • One way skeletal muscles attach to bones
  • Ex: Achilles →
fascia
Fascia
  • Tough sheet-like membrane that covers and protects tissue
  • Ex: back
muscle actions
Muscle Actions
  • Origin
    • End of the muscle that does not move
  • Insertion
    • End of the muscle that does move
muscle movements
Muscle Movements
  • Adduction
    • Moving a body part toward the midline
abduction
Abduction
  • Moving a body part away from the midline
flexion
Flexion
  • Decreasing the angle between 2 bones or bending a body part
extension
Extension
  • Increasing the angle between 2 bones or straightening a body part
rotation
Rotation
  • Turning a body part around it’s own axis
circumduction
Circumduction
  • Moving in a circle at a joint while the other end stays stationary
muscle tone
Muscle Tone
  • State of partial contraction
  • Muscles have some tone at all times
atrophy
Atrophy
  • Lack of muscle tone
  • Occurs when muscles are not used for a long period of time they shrink in size and lose strength
contracture
Contracture
  • A severe tightening of a flexor muscle resulting in a bending of a joint
  • Ex: Foot drop
diseases
Diseases
  • Muscular Dystrophy
    • Group of inherited diseases that lead to chronic progressive muscle atrophy
  • Fibromyalgia
    • Widespread pain in specific muscle sites
    • S/S muscle stiffness, numbness, tingling, pain
  • Muscle Spasms
    • Cramps
    • Sudden involuntary muscle contraction
  • Strain
    • Overstretching of or injury to a muscle or tendon