Body Movements. Muscles and Body Movements Movement results when a muscle moves an attached bone Movement results when a muscle moves an attached bone.

Body MovementsBody Movements

Muscles and Body Muscles and Body MovementsMovements

►Movement results when a muscle Movement results when a muscle moves an attached bonemoves an attached bone

►Muscles are attached to at least two Muscles are attached to at least two pointspoints OriginOrigin

► Attachment to a immoveable boneAttachment to a immoveable bone

InsertionInsertion► Attachment to an movable boneAttachment to an movable bone

Muscles and Body Muscles and Body MovementsMovements

Types of Ordinary Body Types of Ordinary Body MovementsMovements

►FlexionFlexion Decreases the angle of the jointDecreases the angle of the joint Brings two bones closer togetherBrings two bones closer together Typical of hinge joints like knee and elbowTypical of hinge joints like knee and elbow

►ExtensionExtension Opposite of flexionOpposite of flexion Increases angle between two bonesIncreases angle between two bones

Types of Ordinary Body Types of Ordinary Body MovementsMovements

Types of Ordinary Body Types of Ordinary Body MovementsMovements

Hyperextension: results when angle is > 180 ̊

Types of Ordinary Body Types of Ordinary Body MovementsMovements

►RotationRotation Movement of a bone Movement of a bone

around its around its longitudinal axislongitudinal axis

Common in ball-and-Common in ball-and-socket jointssocket joints

Example is when Example is when you move atlas you move atlas around the axis around the axis vertebra (shake your vertebra (shake your head “no”)head “no”)

Types of Ordinary Body Types of Ordinary Body MovementsMovements

►AbductionAbduction Movement of a limb Movement of a limb

away from the away from the midlinemidline

►AdductionAdduction Opposite of Opposite of

abductionabduction Movement of a limb Movement of a limb

toward the midlinetoward the midline

Types of Ordinary Body Types of Ordinary Body MovementsMovements

►CircumductionCircumduction Combination of Combination of

flexion, extension, flexion, extension, abduction, and abduction, and adductionadduction

Common in ball-and-Common in ball-and-socket jointssocket joints

Special MovementsSpecial Movements

►DorsiflexionDorsiflexion Lifting the foot so Lifting the foot so

that the superior that the superior surface approaches surface approaches the shinthe shin

►Plantar flexionPlantar flexion Depressing the foot Depressing the foot

(pointing the toes)(pointing the toes)

Special MovementsSpecial Movements

►InversionInversion Turn sole of foot Turn sole of foot

mediallymedially

►EversionEversion Turn sole of foot Turn sole of foot

laterallylaterally

Special MovementsSpecial Movements►SupinationSupination

Forearm rotates laterally so palm faces up Forearm rotates laterally so palm faces up (anterior)(anterior)

►PronationPronation Forearm rotates medially so palm faces down Forearm rotates medially so palm faces down

(posterior)(posterior)

Special MovementsSpecial Movements►OppositionOpposition

Move thumb to touch the tips of other fingers Move thumb to touch the tips of other fingers on the same handon the same hand