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anatomi sistem muskuloskeletal otot
Citation preview
OTOT
Dr. Charles A Simanjuntak, dr, SpOT(K), FICS, MPd
FKIK Universitas Jambi
2Charles2ASjuntak, FKIK-Unja
Charles2ASjuntak, FKIK-Unja 3Figure 7-11(b)
Charles2ASjuntak, FKIK-Unja 4
Muscle Tissue Characteristics Excitability
Tissue can receive & respond to stimulatio
ContractilityTissue can shorten & thicken
ExtensibilityTissue can lengthen
ElasticityAfter contracting or lengthening, tissue
always wants to return to its resting state
Charles2ASjuntak, FKIK-Unja 5
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Muscle Tissue Functions
Movement – both voluntary & involuntary
Maintaining posture
Supporting soft tissues within body cavities
Guarding entrances & exits of the body
Maintaining body temperature
Charles2ASjuntak, FKIK-Unja 6
Types of muscle tissue:
• Skeletal
• Cardiac
• Smooth (Visceral)
Charles2ASjuntak, FKIK-Unja 7
Anatomy of skeletal muscles
Skeletal muscle
fiber (cell)
Muscle Fascicle
Surrounded by perimysium
Surrounded by endomysium
endomysium
perimysium
Skeletal muscle
Surrounded by epimysium
epimysium
tendon
Charles2ASjuntak, FKIK-Unja 8
Microanatomy of a Muscle Fiber (cell)
Charles2ASjuntak, FKIK-Unja 9
Microanatomy of a Muscle Fiber (Cell)
sarcolemma
transverse (T) tubules sarcoplasmic
reticulumterminal cisternae
myofibril
thin myofilament
thick myofilament
triad
mitochondria
nuclei
myoglobin
Charles2ASjuntak, FKIK-Unja 10
Muscle fiber
myofibril
Thin filaments Thick filaments
Thin myofilamentMyosin molecule ofthick myofilament
sarcomere
Z-line
Charles2ASjuntak, FKIK-Unja 11
Thin Myofilament
(myosin binding site)
Z-line (Z-disc)
Charles2ASjuntak, FKIK-Unja 12
Thick myofilament
(has ATP & actin binding
site)
M-line
Play IP sliding filament theory p.5-14 for overview of thin & thick filaments
Charles2ASjuntak, FKIK-Unja 13
Sarcomere
Z line Z line
A band
H zone
I band Zone of overlap M line
Zone of overlap
Thin myofilaments Thick
myofilaments
Charles2ASjuntak, FKIK-Unja 14
OTOT RANGKA
• >400 otot rangka sebagai motor hidup– Gerakan aktif– Bentuk tubuh
• Kepala, badan, ekor• Origo dan insersi
Charles2ASjuntak, FKIK-Unja 15
Anatomy of the Muscular System
• OriginMuscle attachment that remains
fixed• Insertion
Muscle attachment that moves• Action
What joint movement a muscle produces
i.e. flexion, extension, abduction, etc.
Charles2ASjuntak, FKIK-Unja 16
Skeletal muscle movements at joints
• Flexion/extension
• Abduction/adduction
• Rotation – left/right; internal(medial)/external(lateral)
• Pronation/supination
• Elevation/depression
• Protraction/retraction
• Dorsiflexion/plantarflexion
• Inversion/eversion
Charles2ASjuntak, FKIK-Unja 17
Contraction
• Isotonic• Isometric
Charles2ASjuntak, FKIK-Unja 18
TENDON
• Substansi interseluler: collagen & fibroblas• Nutrisi & pendarahan minimal• Bentuk tali jaringan fibrotik, ujung otot• Synovial/tendon sheath gerak tendon
bebas
Charles2ASjuntak, FKIK-Unja 19
LIGAMEN
• Substansi interseluler: collagen & fibroblas• Nutrisi & pendarahan minimal• Bentuk pita jaringan fibrotik• Penghubung tulang—tulang, t.rawan—
t.rawan• Penguat/penopang sendi
Question
?Charles2ASjuntak, FKIK-Unja 20