what does origin mean?
where a muscle will originate
what does the insertion mean?
where the muscle ends
what does intrinsic mean?
muscles w/I or belonging soley to the body part on which they act
what does extrinsic mean?
muscles that arise or originate outside the body part on which they act
what is the tibialis anterior named for?
what is the serratus anterior named for?
what is the reason the flexor digitorium named for
what are the biceps named for?
by the number of heads it has
what is the reason for naming the coracoid brachialis?
by its attachment
what is the reason the internal obliques are named?
the direction of the fibers
hat is the reason for the Gluteus maximus name?
because of its shape.
which muscles are parallel in fashion and are longitudinal long and strap like?
what is an example of a parallel muscle?
rectus abdominus and the SCM
how many types of parallel muscles are there?
quadrilateral, oblique and triangular
what is an example of a quadrilateral muscle?
what is an example of a triangular muscle?
what is an example of a fusiform muscle?
all your biceps.
what does a quadrilateral muscle mean?
four sided, usually flat, parallel fibers
what does a triangular muscle mean>
fan shaped, flat, and run from a narrow attachment at one end to broad
what does fusiform mean
rounded muscles and are tapered at ends
How many oblique muscles are there?
unipennate, bipenneate and multipennete
what does unipennate mean?
series of short parallel feather like fibers extending diagonally from the side of a long tendon
what is an example of a unipennate muscle?
what does bipenneate mean?
long with a central tendon with fibers that extend diagonally on either side of the tendon
what is an example of a bipenneate muscle?
what does multipennate mean?
muscle fibers running diagonally between several tendons
what is an example of a mutlipenneate muscle?
what does irritably mean?
ability to respond to a stimulus
what does contractatility mean?
ability to contract and produce tension
what does extensibilty mean?
ability of a muscle to stretch when force is applied to it
ability to return to normal strength
what is tension ?
force built up within a muscle
a muscle can contract 1/2 its length true or false?
what does excursion mean?
distance from maximum elongation to maximum shortening
what does active insufficiency mean?
diminished ability of a muscle to produce active tension
what does passive insufficiency mean?
occurs when an inactive antagonist muscle is of insufficient length to allow full ROM available at the joint crossed by the passive muscle
what does open chain mean?
distal end of an extremity is not fixed to a surface
what does closed chain mean?
distal end of the extremity is fixed to a surface
what is a lever?
a rigid bar that can rotate about a fixed point when a force is applied to overcome resistance
fixed point which the lever rotates
what does a 1st class clever resemble?
a see saw
what does a 2nd class lever look like?
what does a third class lever resemble
the most common our body
what determines mechanical advantage
its determined by dividing the L of F by the L of R
what is a isometric movement?
muscle contraction resulting in o movement of the body part or load
what Isokinetic movement mean?
speed is constant and the load will accomodate
what does Isotonic mean?
constant load variable speedwhat is a
what is a synergist muscle?
a muscle that works with another muscle to enhance a particular motion
what type muscle is a fast twitch muscle?
what type muscle is a slow twitch muscle
tonic muscles are also known as ?
type 1 or slow twitch
what are phasic muscles also known as?
type 2 or fast twitch
muscle fibers are arranged in bundles of what?
what are fasiculii held together by
each fasiculus surrounded by
what is the whole muscle surrounded by?
what is a motor unit comprised of?
a motor neuron and the muscles it innervates
what are the three contractile proceses in the sliding filament theroy?
excitation, coupling, contraction