Joints Articulations, or joints, perform 2 functions: Hold bones together Allow rigid skeletal...
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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.](https://reader036.fdocuments.us/reader036/viewer/2022082212/5a4d1b447f8b9ab0599a2863/html5/thumbnails/1.jpg)
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
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Synarthroses Joints Immovable joints Connected by
Sutures (bones interlock)
Syndesmoses (bones connected by ligaments)
Examples: skull, teeth (gomphosis)
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Amphiarthroses Slightly movable joints Primarily
Symphyses: bones connected by flat disc (fibrocartilage)
Synchondroses: bones connected by hyaline cartilage
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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
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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
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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
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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