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