THE MUSCULAR SYSTEM

1
THE MUSCULAR SYSTEM

• CHAPTER 10

2
Interactions of Skeletal Muscle

• Agonistprime mover
• Antagonistopposes the agonist
• Synergisthelpers
• Fixatorsimmobilizers

3
Naming Skeletal Muscles

• Location
• Shape
• Relative size
• Direction
• Number of origins
• Location of attachments
• Action

4
Fascicle Arrangement
5
Muscle Mechanics

• Lever Systems

6
What is a Lever?

• A lever is a rigid bar that moves on a fixed
  point, or fulcrum, when a force is applied to it.
  The applied force, or effort, is used to move a
  resistance, or load.

7
Mechanical Advantage
8
Mechanical Disadvantage
9
Three Classes of Levers
10
Three Classes of Levers
11
Three Classes of Levers
12
Human Muscular System
13
(No Transcript)
14
(No Transcript)
15
(No Transcript)
16
(No Transcript)
17
(No Transcript)
18
(No Transcript)
19
(No Transcript)
20
(No Transcript)
21
(No Transcript)
22
(No Transcript)
23
(No Transcript)
24
(No Transcript)
25
(No Transcript)
26
(No Transcript)
27
(No Transcript)
28
(No Transcript)
29
(No Transcript)
30
(No Transcript)
31
(No Transcript)
32
(No Transcript)
33
(No Transcript)
34
Homeostatic Imbalances

• Myasthenia gravis
• Rigor mortis
• Atrophy
• Duchenne muscular dystrophy
• Hernia
• Myalgia
• Fibromyositis
• Strain