Joints Articulations, or joints, perform 2 functions: Hold bones together Allow rigid skeletal...

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Joints Articulations, or joints, perform 2 functions: Hold bones together Allow rigid skeletal system flexibility for movement Can be classified structurally or functionally Structural Categories: Fibrous Cartilaginous Synovial Functional Categories: Synarthroses Amphiarthroses Diarthroses

description

Amphiarthroses  Slightly movable joints  Primarily Symphyses: bones connected by flat disc (fibrocartilage) Synchondroses: bones connected by hyaline cartilage

Transcript of Joints Articulations, or joints, perform 2 functions: Hold bones together Allow rigid skeletal...

Page 1: Joints  Articulations, or joints, perform 2 functions: Hold bones together Allow rigid skeletal system flexibility for movement  Can be classified structurally.

Joints Articulations, or joints,

perform 2 functions: Hold bones together Allow rigid skeletal

system flexibility for movement

Can be classified structurally or functionally

Structural Categories: Fibrous Cartilaginous Synovial

Functional Categories: Synarthroses Amphiarthroses Diarthroses

Page 2: Joints  Articulations, or joints, perform 2 functions: Hold bones together Allow rigid skeletal system flexibility for movement  Can be classified structurally.

Synarthroses Joints Immovable joints Connected by

Sutures (bones interlock)

Syndesmoses (bones connected by ligaments)

Examples: skull, teeth (gomphosis)

Page 3: Joints  Articulations, or joints, perform 2 functions: Hold bones together Allow rigid skeletal system flexibility for movement  Can be classified structurally.

Amphiarthroses Slightly movable joints Primarily

Symphyses: bones connected by flat disc (fibrocartilage)

Synchondroses: bones connected by hyaline cartilage

Page 4: Joints  Articulations, or joints, perform 2 functions: Hold bones together Allow rigid skeletal system flexibility for movement  Can be classified structurally.

Diarthroses Freely Movable joints All synovial joints are

diarthroses Ball & Socket

Ball shaped head of 1 bone fits cuplike depression of another bone

Ex.: shoulder, hip joints

Page 5: Joints  Articulations, or joints, perform 2 functions: Hold bones together Allow rigid skeletal system flexibility for movement  Can be classified structurally.

Diarthrotic Joints Plane/Gliding Joint

Allow sliding movements in 1-2 planes

Ex.: intercarpal/intertarsal joints; vertebrocostal joints

Hinge Joint Convex of 1 bone fits

concave surface of another bone

Ex.: elbow, knee, interphalangeal joints

Saddle Joint Articulating surfaces are

convex & concave Thumb joint

Pivot Joint Round/conical surface of 1

bone articulates with shallow depression in another bone

Allow uniaxial rotation Ex.: Atlas/Axis Joint

Condyloid Joint Oval condyle of 1 bone fits

ellipsoidal depression in another bone

Allows biaxial movement Ex.: wrist joint,

metacarpalphalangeal joint

Page 6: Joints  Articulations, or joints, perform 2 functions: Hold bones together Allow rigid skeletal system flexibility for movement  Can be classified structurally.

Joints of the Upper Extremity Shoulder Joint

Glenohumeral Joint Sternoclavicular Joint Acromioclavicular

Joint Elbow Joint

Radiohumeral joint Humeroulnar Joint Radioulnar Joint (x2:

Proximal & Distal)

Wrist Radiocarpal joint Intercarpal joints Carpalmetacarpal joints

Hand Intermetacarpal joints Metacarpalphalangeal

joints Interphalangeal joints

Page 7: Joints  Articulations, or joints, perform 2 functions: Hold bones together Allow rigid skeletal system flexibility for movement  Can be classified structurally.

Joints of the Lower Extremity Sacroiliac Joint Coxal (hip) Joint Patellofemoral Joint Tibiofemoral Joint Tibiofibular Joint (x2:

Proximal & Distal)

Ankle/Foot Talocrural Joint Subtalar Joint Intertarsal Joints Tarsometatarsal Joint Intermetatarsal Joints Metatarsophalangeal

Joints Interphalangeal Joints