Chapter 10 Flashcards
Perimysium
Wraps fibers into bundles called fascicles
Epimysium
Fibrous sheath that surrounds entire muscle
Endomysium
Surrounds each muscle fiber
Fascia
Separates neighboring muscles or muscle groups from each other
Fusiform Muscle
thick in middle and tapered on end
Parallel Muscle
uniform width and parallel fascicles
Triangular Muscle
fan shaped; broad at one end and narrow on the other
Pennate Muscle
feather shaped; fascicles insert into a tendon that runs length wise
Circular Muscle
rings; generally in body openings
Muscle Compartments
A group of functionally related muscles enclosed and separated from each other by a fascia
Direct Attachment
Little separation (to the naked eye) between the muscle and bone
Indirect Attachment
Tendons bridge the gap between the muscle and the bone
Origin
Bony attachment at stationary end of muscle
Insertion
Bony attachment to mobile end of muscle
Belly
Thicker, middle region of muscle between origin and insertion
Action
Effect produced by a muscle
Prime Mover
Muscle that produces the most 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
Entirely contained within a particular region, having both its origin and insertion there
Extrinsic Muscle
Acts upon a designated region but has its origins elsewhere
innervation
Refers to the identity of the nerve that stimulates it
Respiration Muscles
Diaphragm, External Intercostal, Internal Intercostal
Diaphragm
Contraction expands thoracic cavity
External Intercostals
Expands thoracic cavity
Internal Intercostals
Depresses thoracic cavity
Abdominal wall muscles (superficial to deep)
External Abdominal Oblique
Internal Abdominal Oblique
Transverse Abdominal
Rectus Abdominis
