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ESS 303 - Biomechanics. The Muscular System. Muscles and Articulations. Uniarticulate Biarticulate Multiarticulate Active Insufficiency: Difficulty in producing full ROM movements in 2(+) joints at the same time - PowerPoint PPT Presentation
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ESS 303 - Biomechanics
The Muscular System
Muscles and Articulations
UniarticulateBiarticulateMultiarticulate
Active Insufficiency: Difficulty in producing full ROM movements in 2(+) joints at the same time
Passive Insufficiency: Difficulty in achieving full ROM stretches in 2(+) joints at the same time
Pennation
Non-pennated Pennated
Muscle Movement Muscle Fiber Orientation
Pennation
Non-pennated Pennated
Pennation
Fusiform Unipennate Bipennate Multipennate
Gre
ater
Mov
emen
tG
reater Force
Contraction Types
Concentric
Eccentric
Isometric
Isotonic
Isokinetic
Static
Fiber Types
Characteristic Fiber Type
Color White White/red RedCapillaries/mm2 Low Intermediate HighMitochondrial volume Low Intermediate High
Histochemistry IIB IIA I
Biochemistry FG FOG SOGlycolytic capacity High High Low0xidative capacity Low Medium/High High
Contractility FT FT STSpeed of contraction Fast Fast SlowSpeed of relaxation Fast Fast SlowFatigability High Moderate/High LowForce capacity High Intermediate Low
Muscle Belly Fasciculus Fiber (Cell)
Epimysium Perimysium Endomysium
Sarcolemma
Sarcoplasm
Nuclei
Gross Structure
The Sarcomere: Z Line to Z Line
A Band
Thick Filament(Myosin)
M LineZ Line Z Line
Thin Filament(Actin)
I Band I Band
H Zone
A-Band
I-Band
I-Band
H-ZoneM-Line
Z-Line
Z-Line
Light MyromyosinS1
S2Heavy
Myromyosin
Length-Tension Relationship
Too Short
Too Long
Length-Tension Relationship
LengthLength
% o
f Max
Ten
sion
% o
f Max
Ten
sion
Force-Velocity Relationship
Velocity
Forc
e
IsometricEccentric Concentric