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Muscles
Muscles700 skeletal
muscles For each muscle:
NameLocationOriginInsertionMovement
Organization of Muscle Fibers
Parallel Muscles Fascicles = parallel to
long axis of muscle
When contracted:
Organization of Muscle Fibers
Convergent MusclesFibers are spread over a
large area, but come together at a common site
Fibers all pull in separate directions
Organization of Muscle Fibers
Pennate MusclesFascicles form common angle
with tendon
Unipennate –
Bipennate –
Multipennate -
Organization of Muscle Fibers
Circular MusclesFibers are concentrically
arranged around an opening
When muscle contracts –
Muscle TerminologyOrigin –
Insertion –
Action –
GastrocnemiusOrigin – Insertion – Action –
Muscle TerminologyActions
Almost all originate or insert on skeleton
2 methods:Bones affected
Joints affected
Muscle TerminologyAgonist – contraction is
responsible for movementBiceps brachii –
Antagonist – Triceps brachii -
Synergist – helps agonist Most useful at start of contraction
Muscle TerminologyFascicle OrganizationRectus - Tranverse - Oblique –
LocationTemporalis - Brachialis - Gluteus - Glossus -
Muscle TerminologyRelative PositionSuperficialis , externus– Internus, profundus – Extrinsic – Intrinsic –
Structural FeaturesBiceps – Triceps – Quadriceps –
Muscle TerminologyShapeTrapezius - Deltoid - Rhomboidus - Orbicularis -
LengthLongus, teres – Brevis –
SizeMaximus, major - Minimus, minor -
Muscle TerminologyOrigin and InsertionSacrospinalis – Sternocleidomastoid –
FunctionExtensor/flexor - Supinator - Adductor -
AssociationSartoris – Buccinator –
1. Define origin and insertion.
1. Name the origin and insertion of the styloglossus.
2. What action does the flexor carpi ulnaris perform?
Former Canadian Prime Minister Jean Chrétien acquired Bell's palsy in his youth which never resolved
Muscles of the Head
Orbicularis orisLocation
Origin
Insertion
Movement
Orbicularis oculiLocation
Origin
Insertion
Movement
Muscles of the Head
BuccinatorLocation
Origin
Insertion
Movement
MasseterLocation
Origin
Insertion
Movement
Muscles of the HeadTemporalisLocation
Origin
Insertion
Movement
Zygomaticus majorLocation
Origin
Insertion
Movement
Muscles of the HeadRisoriusLocation
Origin
Insertion
Movement
FrontalisLocation
Origin
Insertion
Movement
Muscles of the HeadPlatysmaLocation
Origin
Insertion
Movement
Muscles of the NeckSternocleidomastoidLocation
Origin
Insertion
Movement
Hyoid
1. Where does the temporalis muscle insert?
2. What movement is the orbicularis oris responsible for?
3. What movement is the orbicularis oculi responsible for?
4. Where does the buccinator originate?
Abdominal MusclesTransversus AbdominisLocation
Origin
Insertion
Movement
Rectus AbdominisLocation
Origin
Insertion
Movement
Abdominal Muscles Internal ObliqueLocation
Origin
Insertion
Movement
External ObliqueLocation
Origin
Insertion
Movement
Ribcage MusclesInternal IntercostalsLocation
Origin
Insertion
Movement
External IntercostalsLocation
Origin
Insertion
Movement
Ribcage MusclesDiaphragmLocation
Origin
Insertion
Movement
1. Which layer of abdominal muscle is the most internal?
2. What is the movement of the rectus abdominus muscles?
3. What is the origin of the sternocleidomastoid muscle?
4. Which muscle depresses the jaw?
Muscles of the LegGluteus MaximusLocation
Origin
Insertion
Movement
Gluteus MediusLocation
Origin
Insertion
Movement
Muscles of the LegGluteus MinimusLocation
Origin
Insertion
Movement
Muscles of the LegSemimembranosusLocation
Origin
Insertion
Movement
SemitendinosusLocation
Origin
Insertion
Movement
Muscles of the LegBiceps femorisLocation
Origin
Insertion
Movement
Muscles of the LegGracilisLocation
Origin
Insertion
Movement
Adductor brevisLocation
Origin
Insertion
Movement
Muscles of the LegAdductor longusLocation
Origin
Insertion
Movement
Adductor magnusLocation
Origin
Insertion
Movement
Muscles of the LegSartoriusLocation
Origin
Insertion
Movement
Rectus femorisLocation
Origin
Insertion
Movement
Muscles of the LegVastus lateralisLocation
Origin
Insertion
Movement
Vastus medialisLocation
Origin
Insertion
Movement
Muscles of the LegVastus intermediasLocation
Origin
Insertion
Movement
Muscles of the LegTibialis anteriorLocation
Origin
Insertion
Movement
Muscles of the LegSoleusLocation
Origin
Insertion
Movement
GastrocnemiusLocation
Origin
Insertion
Movement
Muscles of the BackTrapeziusLocation
Origin
Insertion
Movement
RhomboidsLocation
Origin
Insertion
Movement
Muscles of the BackLevator scapulaeLocation
Origin
Insertion
Movement
Pectoralis minorLocation
Origin
Insertion
Movement
Muscles of the BackSerratus anteriorLocation
Origin
Insertion
Movement
Muscles Acting on the ShoulderTeres MajorLocation
Origin
Insertion
Movement
DeltoidLocation
Origin
Insertion
Movement
Muscles Acting on the ShoulderPectoralis majorLocation
Origin
Insertion
Movement
Latissimus dorsiLocation
Origin
Insertion
Movement
Muscles Acting on the ForearmBiceps brachiiLocation
Origin
Insertion
Movement
BrachialisLocation
Origin
Insertion
Movement
Muscles Acting on the ForearmTriceps brachiiLocation
Origin
Insertion
Movement
Muscles Acting on the ForearmFlexors + palmaris longusLocation
Origin
Insertion
Movement
ExtensorsLocation
Origin
Insertion
Movement