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The Muscular System. Chapter 10. The Muscular System. Structure/function of muscles. Organization of Muscles. 600 Human skeletal muscles General structural and functional topics _____________________________ connective tissues of muscle coordinated actions of muscle groups

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the muscular system2
The Muscular System
  • Structure/function of muscles
organization of muscles
Organization of Muscles
  • 600 Human skeletal muscles
  • General structural and functional topics
    • _____________________________
    • connective tissues of muscle
    • coordinated actions of muscle groups
    • _____________________________
the functions of muscles
The Functions of Muscles
  • Movement of body parts and organ contents
  • ____________________________________
  • ___________________ - speech, expression and writing
  • Control of openings and passageways
  • ____________________
connective tissues of a muscle
Connective Tissues of a Muscle
  • Terms:
    • _______________
    • _______________
    • Endomysium
    • Fasicle
    • ______________
    • ______________
    • Deep fascia
location of fascia
Location of Fascia
  • Deep fascia
    • ____________________________
  • ______________________________
    • adipose between skin and muscles
parts of a skeletal muscle
Parts of a Skeletal Muscle
  • ______________
    • attachment to stationary end of muscle
  • Belly
    • _______________ _______________
  • _______________
    • attachment to mobile end of muscle
skeletal muscle shapes
Skeletal Muscle Shapes
  • _____________________________ (biceps brachii m.)
    • thick in middle and tapered at ends
  • Parallel muscles have parallel fascicles
    • rectus abdominis m.
  • Convergent muscle
    • broad at origin and tapering to a narrower insertion
  • ________________ muscles (rectus femoris and deltoid)
    • fascicles insert obliquely on a tendon
    • _________________________________________________
  • ________________ (orbicularis oculi)
    • ring around body opening
muscle actions
Muscle Actions
  • Prime mover or agonist
    • __________________________
  • ______________________ aids the prime mover
    • stabilizes the nearby joint
    • modifies the direction of movement
  • Antagonist
    • ___________________________
    • preventing excessive movement and injury
  • _________________________
    • prevents movement of bone
muscle actions during elbow flexion
Muscle Actions during Elbow Flexion
  • Prime mover (agonist) = brachialis
  • Synergist = biceps brachii
  • Antagonist = triceps brachii
  • Fixator = muscle that holds scapula firmly in place
    • rhomboideus m.
slide11
Bipennate parallel circular

convergent multipennate

fusiform unipennate

slide12
fiber
  • Fibril
  • perimysium
  • Fasicle
  • endomysium
  • Epimysium
  • Deep fascia
intrinsic and extrinsic muscles
Intrinsic and Extrinsic Muscles
  • ___________ are contained within a region such as the hand.
  • ______________ move the fingers but are found outside the region.
skeletal muscle innervation
Skeletal Muscle Innervation
  • _____________ arising from the brain
    • exit the skull through foramina
    • numbered I to XII
  • ____________________ arising from the spinal cord
    • exit the vertebral column through intervertebral foramina
how muscles are named
How Muscles are Named
  • English names for muscles are modifications of the Latin names.
  • Table 10.1 = terms used to name muscles
    • _______________ = elevates a body part
    • profundus = deepest
    • _____________________ = having 4 heads
athletic injuries
Athletic Injuries
  • Vulnerable to sudden and intense stress
  • Proper conditioning and warm-up needed
  • Common injuries
    • _____________________
    • pulled hamstrings
    • _____________________
  • Treat with rest, ice, compression and elevation
  • “No pain, no gain” is a dangerous misconception
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