Uploaded on

 

  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
210
On Slideshare
0
From Embeds
0
Number of Embeds
1

Actions

Shares
Downloads
4
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. + MUSCULAR SYSTEM Skeletal Muscles and their classifications
  • 2. + KEY CONCEPTS  Skeletal muscles all have features that distinguish what they can do; in particular, movements that they make and force they can generate.
  • 3. + KEY FUNCTIONS  Support and posture – muscles are in a continuous state of ‘tone’ that affects their ability to help our body maintain an upright posture. Poor posture can result in aches and pains The trapezius, rhomboids and latissimus dorsi are crucial postural muscles  Movement – voluntary control  Essential body functions – generally under involuntary control (which have little or no conscious control)    Digestion Respiration Circulation
  • 4. + Common features of muscles  Nervous control – CNS stimulus controls muscle action  Contractility – when muscles contract they get shorter  Extensibility – muscles have the capacity to lengthen  Elasticity – muscles return to the original shape/size after stretching  Atrophy – muscles can decrease in size as a result of injury or lack of exercise  Hypertrophy – muscle can increase in size (grow) with increased exercise/training
  • 5. + MUSCLE FIBER TYPES  Cardiac   Smooth   Muscles of the heart Digestive system and blood vessels Skeletal  Attached to bones and responsible for movement
  • 6. + SKELETAL MUSCLES YOU NEED TO KNOW!
  • 7. + CLASSIFICATION OF SKELETAL MUSCLE
  • 8. + OVERVIEW  Skeletal Muscles can be classified by their fibre arrangement around the tendon.
  • 9. + FUSIFORM MUSCLES  the muscle fibres run the length of the muscle belly.  Designed for mobility – low force over a long range  E.g. Sartorius, biceps
  • 10. + PENNIFORM MUSCLES  Fibres run at angles to the tendon. Designed for strength and power.  They make up 75 per cent of the skeletal muscles  Three Categories  Unipennate  Bipennate  Multipennate
  • 11. + UNIPENNATE  Fibres are found on only one side of a central tendon  E.g. Tibialis Anterior
  • 12. + BIPENNATE MUSCLES  The fibres run off either side of a central tendon  E.g. rectus femoris (quads)
  • 13. + MULTIPENNATE MUSCLES  Fibres branch out from several tendons.  This arrangement enables the body the generate the greatest force.  E.g. Deltoid
  • 14. + Radiate Muscles  These muscles are a compromise between fusiform and pennate muscles because they are capable of producing strength and power without compromising mobility  Eg: pectoralis major, latissimus dorsi