Muscles and Functions
Terms
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- Trapezius
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Origin: Occipital/ Cervical and thoracic vertebrae
Insertion: Scapula/clavicle
Motion: 1. elevates shoulders
2. extended
3. abbduction - LEVATOR SCAPULA
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ORIGIN: VERTEBRAE
INSERTION: SCAPULA - RHOMBOIDEUS
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ORIGIN: VERTEBRAE
INSERTION: SCAPULA
MOTION: ADUCTION - PECTORALIS MINOR
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ORIGIN: RIBS 3-5
INSERTION: SCAPULA
MOTION: 1. DEPRESS SHOULDER
2. ABDUCTS SCAPULA - SERRATUS ANTERIOR
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ORIGIN: STERNUM/CLAVICLE
INSERTION: MASTOID PROCESS
MOTION: HYPEREXTENDED - SACROSPINALIS
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ORIGIN: LUMBAR, THORACIC
INSERTION: CERVICAL
MOTION: EXTENDS AND HYPER EXTENDS - EXTERNAL OBLIQUE
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ORIGIN: RIBS
INSERTION: ILIAC CREST - INTERNAL OBLIQUE
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ORIGIN:ILIAC CREST
INSERTION: RIBS - TRANSVERSALIS
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ORIGIN: RIBS
INSERTION: PUBIC BONE - LINEA ALBA
- FIBROUS BAND (WHITE LINE) EXTENDING FROM XIPHOID PROCESS TO PUBIS SYMPHYSIS. SEPARATES MUSCLES
- EXTERNAL INTERCOSTALS
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ORIGIN: LOWER RIBS
INSERTION: UPPER RIBS - INTERNAL INTERCOSTALS
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ORIGIN: INNER SURFACE OF RIBS
INSERTION: UPPER RIBS - DIAPHRAGM
- ORIGIN: XIPHOID PROCESS/RIBS
- PECTORALIS MAJOR
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ORIGIN: STERNUM, CLAVICLE, RIBS
INSERTION: HUMERUS - LATISSIMUS DORSI
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ORIGIN: CONNECTIVE TISSUE OVER THE LUMBAR REGION
INSERTION: HUMERUS - DELTOID
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ORIGIN: CLAVICLE, SCAPULA
INSERTION: HUMERUS - BICEPS BRACHI
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ORIGIN: SCAPULA
INSERTION: RADIUS - BRACHALIS
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ORIGIN: HUMERUS
INSERTION: ULNA - BRACHIORADIALIS
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ORIGIN: HUMERUS
INSERTION: RADIUS - TRICEPS BRACHIL
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ORIGIN: SCAPULA/HUMERUS
INSERTION: ULNA - PRIME MOVER
- MUSCLE THAT CAUSES DESIRED ACTION
- SYNERGIST
- WORK TOGETHER WITH PRIME MOVER
- ANTAGONIST
- OPPOSITE EFFECT OF THE PRIME MOVER
- ORIGIN:
- THE PLACE OF MUSCLE ATTACHMENT THAT USUALLY IS THE MORE STATIONARY POINT
- INSERTION
- THE PLACE OF MUSCLE ATTACHMENT THAT USUALLY IS THE MORE MOVABLE POINT
- SARCOMERE
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SACROMERES ARE THE FUNCTIONAL AND STRUCTURAL UNIT OF A MUSCLE
THE Z LINE DIVIDES MYOFIBRILS INTO A SERIES OF REPEATING SEGMENTS CALLED SARCOMERES - LIGHT BANDS
- I BANDS: ISOTOPIC (LIGHT CAN PASS THROUGH)
- DARK BANDS:
- A BANDS ANISOTOPIC (LIGHT CANT PASS THROUGH)
- H BAND
- IS THE LESS DENSE AREA OF THE A BAND (LITTLE LIGHT)
- Z LINE
- CROSSING THE CENTER OF EACH I BAND IS A DENSE FIBROUS CONNECTIVE TISSUE
- MYOSIN
- THICK: CONTAINS SUBUNITS SHAPED LIKE GOLF CLUBS
- ACTIN
- THIN: CONSISTS OF PROTEINS: TROPONIN ANDTROPOMYOSIN
- WHAT ARE THE FUNCTIONS OF MUSCLES?
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1. POSTURE
2. MOVEMENT OF BODY PARTS
3. PROPULSION
4. ALTERATION OF DIAMETER OF BODY TUBES
5. HEAT PRODUCTION
6. COMMUNICATION (BODY LANGUAGE)
7. PROTECTION