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Defintions
Term | Definition |
---|---|
Occipitofrontalis | raises the eyebrows |
orbicularisoculi | closes the eyelids |
orbicularis oris | puckers the lips |
buccinator | flattens the cheeks |
Zygomaticus | smiling muscle |
Levator labii superioris | sneering |
depressor anguli oris | frowning |
sternocleidomastoid | lateral neck muscle and prime mover |
platsyma | sheetlike muscle that covers the anterolateral neck |
erecotor spinae | group of muscles on each side of the back |
external intercostal | elevate the ribs during inspirtation |
internal intercostals | contract during forced expiration |
diaphragm | accomplishes quiet breathing |
one of the strongest muscles | temporalis |
trapezius | rotates scapula |
serratus anterior | pulls scapula anteriorly |
pectoralis major | adducts and flexes the arm |
Latissimus dorsi | medially rotates, adducts, and powerfully extends arm |
deltoid | attaches the humerous to the scapula and clavicle |
triceps brachii | extends the forearm |
biceps brachii | flexes the forearm : occupies the anterior compartment of arm |
brachialis | flexes forearm |
brachioradialis | flexes and supinates the forearm |
retinaculum | strong band of fiberous connective tissue that covers the flexor and extensor tendons and holds them into place around the wrist so that they don't bowstring during muscle contraction |
flexor carpi | flexes the wrist |
extensor carpi | extends the wrist |
flexor digitorumf | flexes the fingers |
extensor digitorum | extends the fingers |
intrinsic hand muscles | located within hand |
interossi muscles | located between the metacarpals |
gluteus maximus | buttocks |
quadriceps femoris | extends the leg; anterior thigh muscle |
sartorius | tailors muscle (flexes the thigh) |
hamstring | posterior thigh muscles; flexes the leg and extends the thigh |
Gastrocnemius and soleus | form of the calf muscle |
Calcaneal tendon also known as | Achilles tendon |
Lateral muscle of the leg | peroneus |
instrinsic foot | muscles flex, extend, abduct, and adduct the toes |
extrinsic | moves the tongue |
instrinsic | changes the shape of the tongue |
Tendinous inscriptions | cross the rectus abdominis at three or more locations |
linea alba | consists of white connective tissue rather than muscle |
on each side of the linea alba is the | Rectuys Abdominis |
contraction | process of becoming smaller |
Muscle Fibers | Cell composed of my fibers that contract when stimulated |
Skeletal muscle | connected to the skeleton to form part of mechanical system |
endomsyium | ensheaths each individual myocyte |
Perimsyium | shealth of connective surrounding a bundle of muscle fibers |
Epimysium | fiberous elastic tissues surrounding a muscle |
Fasicle | Bundle of structures |
Smooth Muscle | contractile fibers are not highly ordered |
Cardiac Muscle | Another term for myocaridum |
Sarcolemma | fine transparent tubular shealth |
sarcomere | structural unit of a myofiber in striated muscle |
myosin | fibrous protein that forms the contractile filaments of muscle |
Actin | protein that forms (together with myosin) |
Sarcoplasmic reticulum | specialized endoplasmic of cardiac muscle |
motor unit | made up of a motor neuron and the skeletal muscle |
axon | long threadlike part of a nerve cell |
Acetylcholine | Compound that occurs throughout the nervous system |
Muscle Fatigue | Muscle to generate force |
Isotonic Contractions | length of muscle changes |
Isometric contractions | strength training in which joint angle and muscle length do not change |
origin | where something begins |
insertion | action of inserting something |
synergists | a substance organ |
antagonist | substances that inhibits physiological action |
fixators | muscle that acts of a stabilizer |
four major functional characteristics | contractility, excitability, elasticity, extensibility |
each skeletal muscle is surrounded by a connective tissue shealth called | Epimysium |
Fascia | another connective tissue located outside epimysium |
Muscle composed of numerous visible bundles | Fasiculli |
Each side of a "Z line" is an | I band |
What kind of line is in between two A bands? | M line |
Contractility | shorten with force |
Excitability | capacity to respond to a stimulus |
extensibillity | ability to stretch |
elaasticity | ability to recoil to original stretch |
muscle fiber | single cylindril cell containing several nuclei |