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RAD 110 Exam 2
Part 4
| Question | Answer |
|---|---|
| Functional Joints | Based on amount of mobility |
| Structural Joints | Based on structure and type of tissue |
| _______________ has three subdivisions based on amount of mobility of joint | Functional Joints |
| Synarthroses | immovable |
| Amphiarthroses | slightly movable |
| Diarthroses | freely movable |
| ________________ has three structural subdivisions based on structure and connective tissues | Structural Joint |
| Fibrous | No joint cavity and no cartilage, strongest joints, 3 subdivisions |
| Cartilaginous | No joint cavity, Hyaline or Fibro Cartilage, 2 subdivisions |
| Synovial | Full joint cavity surrounded by an articular capsule, 6 subdivisions |
| Fibrous Joints | Do not have a joint cavity or cartilage |
| Fibrous Joints | Are the strongest joints in the body |
| Suture | Type of Immovable fibrous joint only found in the skull |
| Gomphosis | Type of Immovable fibrous joint found only in roots of teeth |
| Syndesmosis | Slightly movable fibrous joint united by fibrous sheets. Example: inferior tibiofibular joint |
| Cartilaginous Joints | Do not have a joint cavity, but do have cartilage (hyaline or fibro cartilage) |
| Symphysis | Slightly movable cartilaginous joint separated by a pad of fibrocartilage designed for strength and shock absorbency |
| Synchondrosis | Immovable cartilaginous joint united by rigid hyaline cartilage |
| Example of Symphysis joint | pubic symphysis, intervertebral joints |
| Example of Synchondrosis joint | epiphyseal plate |
| Synovial Joints | Complex joints that are enclosed by articular capsule |
| All __________ Joints are freely moveable | Synovial |
| 6 types of synovial joints | Gliding, Hinge, Pivot, Ellipsoid, Saddle, and Ball and socket |
| Gliding Joint | Simplest synovial joint |
| Gliding Joint | Uniaxial: glide in one axis |
| Gliding Joint examples | intercarpal, Intertarsal, proximal tib/fib, and zygapophyseal joints |
| Hinge Joint | Uniaxial movement: flexion & extension |
| Hinge Joint examples | Elbow, Knee, Interphalangeal and Tibiotalar |
| Pivot Joint | Uniaxial movement: Rotates around an axis |
| Pivot Joint examples | atlantoaxial joint (C1-C2 joint) and radioulnar (both distal and proximal) |
| Ellipsoid Joint | Biaxial movement: flexion, extension, abduction, adduction, and circumduction |
| Ellipsoid Joint examples | Radiocarpal (wrist) joint and Metatarsophalangeal |
| Saddle Joint | Joint is same as ellipsoid, but articular surface different, allows biaxial movement |
| Saddle Joint examples | 1st carpometacarpal joint (thumb joint) |
| Ball-and-Socket Joint | Permits widest range of motion |
| Ball-and-Socket Joint example | Hip and shoulder |
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