Download Neuromuscular Aspects (1)

Biomechanics of Skeletal Muscle
(Hamill ch 4, Cram Ch 2,
pp 43-64)

Properties of muscle-tendon function
- Extensibility and elasticity
• Elastic and contractile components
- Irritability and the ability to develop tension
Structural Org of Skeletal Muscle
 Motor Unit

Biomechanics of Skeletal Muscle

The motor unit and Electromyography (Figure from
lab)
- motoneuron & all innervated fibers
- Fiber types I (SO), IIA (FOG), IIB (FG)
Muscle Fiber Type
 Selective recruitment of fiber types – size
principle:

• SO
FOG
FG
Recruitment proceeds
from smallest fibers to
largest
(the size principle)
Muscle Fiber
Types
Methodology article:
DeLuca, Carlo J. (1997) The use of surface
Electromyography in biomechanics.
J Appl Biomech, 19:135-163.
Review Article:
Morrish, G. (1999) Surface electromyography
Methods of analysis, reliability, and main applications
Physical and Rehabilitation Medicine, 11:171-205.
EMG website assignment:
EMG Tutorials and Whitepapers