Introduction to Myology

Dr Anita RaniProfessorAnatomyKGMU

Major functions of muscle

• Regulating movement• Stabilizing body positions• Movement of materials around body• Properties:

ExcitabilityContractilityExtensibilityElasticity

3 different types of muscle• Skeletal

– Move skeleton– Striated– Voluntary

• Cardiac– Striated– Involuntary– Autorhythmicity

• Smooth– Not striated– Usually involuntary– Some

autorhythmicity

Organization of a Muscle

Motor Unit

Parts of a Muscle

Types of Skeletal Muscle

Types of skeletal Muscles

Muscle contraction

[A] Reflexive[B] Tonic[C] Phasic

Functions of muscles

Prime Mover

Fixators

Synergist

Antagonist

Applied Anatomy

• Muscle Dysfunction & Paralysis• Absence of muscle tone• Muscle Soreness or Pulled muscle• Growth & Regeneration of Skeletal muscle• Muscle testing ManualEMG• Hypertrophy of the myocardium• Myocardial Infarction• Hypertrophy & Hyperplasia of smooth muscles