Articulations and Body Movements

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created 8 years ago by tyspressley
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Chapter 11
updated 8 years ago by tyspressley
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1

Two functions of an articulation

hold bones together
allow the rigid skeletal system flexability

2

How are joints classified

structure & function

3

Functional classification is based on

The amount of movement at a joint

4

Amphiarthroses

Slightly movable
Dominates Axial skeleton

5

Which is more clear cut structure or function

Structural classification is more defined.

6

Amphiarthrotic

slightly movable

7

Diarthrotic

Freely movable
Dominates limbs

8

Synarthrotic

Immovable
This type dominates the Axial skeleton

9

Structural classification is based on

presence of connective tissue fiber,cartilage, or a joint cavity.

10

Names of structural classifications

Fibrous
Cartilaginous
Synovial

11

Cartilaginous

AMPHIARTHROTIC Slight degree of movement
Cartilage connecting bony portions
ie...pubic symphsis & vertebral bodies,costal cartilage

12

Synovial

DIARTHROTIC freely movable
Fibrous articular capsule lined w/a synovial membrane
Joint cavity present
Hip,knee,& elbow

13

Fibrous

SYNARTHROTIC-essentially immovable
bone regions united by fibrous connective tissue
ie....sutures

14

ABDUCTION

MOVEMENT AWAY FROM MIDLINE

15

ADDUCTION

MOVEMENT TOWARDS MIDLINE

16

CIRCUMDUCTION

THE LIMB AS A WHOLE OUTLINES A CONE
FOUND IN BALL & SOCKET JOINTS

17

ROTATION

AROUND IT'S OWN LONGITUDINAL AXIS

18

EXTENSION

TO INCREASE THE ANGLE OF A JOINT

19

FLEXION

TO DECREASE THE ANGLE OF A JOINT

20

PRONATION

INWARD ROTATION OF FOREARM

21

SUPINATION

OUTWARD ROTATION OF FOREARM

22

THE SHAPE OF AN ARTICULAR SURFACES DETERMINES?

TYPES OF MOVEMENT THAT CAN OCCUR

23

PLANE JOINT

NONAXIAL
GLIDING MOVEMENTS
EX:INTERCARPAL JOINTS VERTEBRAL ARTICULAR SURFACES

24

HINGE JOINT

UNIAXIAL
ONE PLANE MOVEMENT
USUALLY FLEXION OR EXTENSION
EX:ELBOW

25

PIVOT JOINT

UNIAXIAL
ONE PLANE MOVEMENT
EX:ALANTOAXIAL JOINT (between atlas & axis)

26

CONDYLAR JOINT

BIAXIAL
MOVEMENT IN 2 PLANES
FLEXION/EXTENSION
ABDUCTION/ADDUCTION
EX:WRIST & METACARPOPHALANGEAL JOINTS
(KNUCKLES)

27

SADDLE JOINT

BIAXIAL
MOVEMENT IN 2 PLANES
FLEXION/EXTENSION
ABDUCTION/ADDUCTION
EX:CARPOMETACARPAL JOINTS OF THE THUMB

28

BALL & SOCKET

MULTIAXIAL
MANY PLANES
FLEXION/EXTENSION
ABDUCTION/ADDUCTION
ROTATION
EX: SHOULDERS/HIPS