Chapter 10 part 1&2 Flashcards
(35 cards)
Myology
The study of muscles
Muscular system
Comprised of about 600 skeletal muscles
Endomysium
Areolar C.T. Covering an individual muscle fiber
Fascicles
Bundle of muscle fibers
Perimysium
C.T. Sheath surrounding an individual fascicle
Epimyium
C.T. Layer surrounding an individual muscle
Deep fascia
C.T. Sheet separating adjacent muscles.
Superficial fascia
C.T. Sheet separating muscle and skin
Direct (fleshy) attachment
Muscle attachment to bone in which collagen fibers of the epimysium are continuous with the periosteum
Indirect attachment
Muscle attachment in which the epimysium form a tendon that merges into the periosteum.
Fusiform muscle
Muscle that is thick in the middle and tapered at each end
Parallel muscle
Muscle that has a uniform width
Convergent muscle
Muscle that is fan-shaped
Pennate muscle
Muscle that is feather-shaped.
Circular muscle
Muscle that forms a ring around a body opening.
Prime mover (agonist)
Muscle that produces most of the force during a particular joint action.
Synergist
Muscle that aids the prime mover
Antagonist
Muscle that opposes the prime mover.
Fixator
Muscle that prevents a bone from moving.
Intrinsic muscle
Muscle entirely contained within a particular region. Having both it origin and insertion there.
Extrinsic
Muscle that acts upon a designated region but has its origin elsewhere.
Innervation
Nerve supply to an organ.
Rectus sheath
Fibrous sleeve enclosing the rectus abdominis
Linea alba
Bertical brivrous strip separating the rectus abdominis into right and left halves.