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The body contains more than ____ skeletal muscles
600
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______ surrounds an individual muscle fiber
endomysium
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_____ surrounds a fascicle (bundle) of muscle fibers
perimysium
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______ Surrounds entire muscle organ
epimysium
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Pennate Muscles are said to be
- "featherlike"
- Ex: Flexor Pollicus Longus, Rectus Femoris, & Deltoid
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Parallel muscles can
- vary in length, but long "straplike"
- Ex. Rectis abdominis & Sartorius
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Convergent Muscles have
- fasicles radiating out from small to wider point of attachment
- Ex. Pectoralis Major
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Fusiform muscles have
- fiscicles that may be close to parallel in the center, but converge to a tendon at one or both ends
- Ex. Brachioradialis
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Spiral Muscle have
- fibers that twist between points of attachment
- Ex. Latissimus dorsi
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Curcular muscles often
- circle body tubes or openings
- Ex. Orbicularis oris (mouth muscle)
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Point of attachemtn that moves when the muscle contracts
Insertion
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Point of attachemnt that does not move when muscle contracts
- Origin
- (Therefore the origin bone is the more stationary of the two bones at a joint)
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Prime mover is used to describe
a muscle that directly preforms a specific movement (main muscle that contracts directly)
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Agonist can be
ANY mover that directly contributes to the same action as the prime mover
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Antagonists are
muscles that when contracting, directly oppose prome movers or agonists
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Synergists are
muscles that contract at the same time as the prime mover
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A form of a synergists is a Fixator muscle generally
functions as joint stabilizers
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Lever System:
- 1. Lever (Bone)
- 2. (F)ulcrum (Joint)
- 3. (L)oad (resistance that is moved)
- 4. (P)ull (muscle contraction)
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What muscles are involved in posture
All muscles contribute to standing upright
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3rd Class Lever
Pull between the fulcrum and the load
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Synovial joint of the shoulder move in
all planes of the body, Transverse, Sagital, Frontal
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Abdominal Wall
External Oblique
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Upper part of arm (front)
Biceps Brachii
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Upper part of arm (back)
Triceps Brachii
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Buttocks
Gluteus maximus, and gluteus medius
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Anterior Thigh
Quadriceps Femoris
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Posterior Thigh
Hamstring group
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Front of forehead
Occipitofrontalis
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Thin back head muscle
Epicranial aponeurosis
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Eye brow muscle
Corrugator supercilii
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Eye Muscle
Obucularis oculi
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Kissing/Sucking muscle
Buccinator
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Mouth muscle
Obicularis oris
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Back of the head
Occipitofrontalis
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Obicularis oris has its
origin in fasha
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What three muscles do you use to close your mouth
Temporalis, Masseter, and Buccinator
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What two muscles do you use to open your mouth
Lateral pterygoid mucle, Medial pterygoid muscle
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Muscle that helps you stick out your tounge
Genioglossus (Genio-chin & glossus-tounge)
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External intercostals
rib forward fibers
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Internal intercostals
ribs backward fibers
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Anal triangle
supports genital/urinary tract
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Outter portion of anus
External anal sphincter
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Floor of pelvic organs
Levator ani
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