Myology Flashcards
what are the muscle fibres properties
-contractility: allows to shorten
-muscle tension
what are the three types of muscle
-skeletal
-cardiac
-smooth
skeletal muscle
-attaches to the skeleton and moves the skeleton
- organized into a strained pattern
-it is under voluntary control
what does skeletal muscle consist of
-75% water
-20% protein
smooth muscle
-found in. the walls of hollow oragns or blood vessels
-contracticile muscles rent aligned making a smooth appearance
-involunetary control
-multinucleated cell (syncytium)
cardiac muscle
-contarctile tissue in heart wall
-both smooth and skeletal characteristics
-straited and under involuntary control as well as multineaclted allowing the movement of blood
what are the functions of the skeletal muscle
-produce skeletal ovemtn
-maintain posture
-breathing
-support weight of organs and soft tissues
what is the criteria used to name/ identity muscle
-shape
-action
-location
-division
-size relitionship
-direction of fibres
what is fascilsi
bundle of muscles
what are the two ways the faciscili can arrange itself
-run parallel to long axis of muscle and produce more range of motion but less strength
-insert diagonally into a tendon running the length of the muscle sand produce less range of motion but more strength
unipennate
all facsiluni inserted on one side of a tendon
eg: the semibrenansos
bipennate
faculini insert both sides of tension
eg: rectus femoris
multipennate
convergance of several tendons
eg: deltoids
advantage and disadvantage of a pennate muscle
since going into tendon less range of motion but greater strength
what are the three parts called that allow a muscle to move
-prime mover
-antagonist
-fixators/stabalizers
antagonist movers function
muscle that opposes one another upon contraction (located on opposite sides of joints)
prime movers function
-muscle that contacts only for movements
fixtaors/stabilizers function
muscles that immobilize a bone or joint near the origin near the prime over s the prime mover can act more effenciantly
location and movement of origin
proximal and less movable
location and movement of insterion
more movable and distal
location and movement of belly
widest portion between insertion and origin
what is the exceptions of insertions In the body
doesn’t insert on the bone everywhere on the face its the skin
name three layers for intramsuclar pressure
- episyium (whole muscle)
-perysium (bundles of muscle fibres
-endosyium (muscle fibres)
