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Joints Chapter 8 What is a joint? Defined as the site where two or more bones meet. Also called an “articulation” Joints allow our skeleton mobility and they hold our skeleton together Classification of Joints Functional classification Synarthroses Amphiarthroses Diarthroses Classification of Joints Structural classification Fibrous joints Cartilaginous joints Synovial joints FIBROUS JOINTS General Characteristics Bones are joined by fibrous tissue No joint cavity is present Most are immovable but some are slightly moveable TYPES OF FIBROUS JOINTS Sutures (synostoses) Syndesmoses Gomphoses FIBROUS JOINTS Sutures FIBROUS JOINTS Syndesmoses FIBROUS JOINTS Gomphoses CARTILAGINOUS JOINTS General Characteristics Articulating surfaces are united by cartilage No joint cavity Can be synarthrotic or amphiarthrotic TYPES OF CARTILAGINOUS JOINTS Synchondroses Symphyses CARTILAGINOUS JOINTS Review Question What is the scientific term for a joint that is immovable? a. Diarthrotic b. Amphiarthrotic c. Synarthrotic Review Question Which of the following is an example of a fibrous joint? a. Synchondroses b. Syndesmoses c. Symphyses Review Question Which of the following best describes a suture? a. Synchondroses b. Syndesmoses c. Symphyses d. Synostoses e. Gomphoses SYNOVIAL JOINTS General Characteristics Articular bones are separated by a fluid-filled cavity Joints of limbs Diarthrotic SYNOVIAL JOINTS SYNOVIAL JOINTS Movements of synovial joints Axis of motion Nonaxial Uniaxial Biaxial Multiaxial GLIDING MOVEMENTS Angular Movements Angular Movements Angular Movements Special Movements Special Movements Special Movements Review Question Which of the following best describes someone who is “pigeon-toed”? a. Medial rotation b. Lateral rotation c. Circumduction d. Inversion e. Eversion Review Question Which of the following muscle actions best describes “windmill” exercises? a. Medial rotation b. Lateral rotation c. Circumduction d. Inversion e. Eversion Types of Synovial Joints Types of Synovial Joints Types of Synovial Joints Types of Synovial Joints Types of Synovial Joints Types of Synovial Joints Review Question Which of the following types of synovial joint is found within the joint between the 1st metacarpal and 1st phalange? a. Saddle b. Pivot c. Hinge d. Ball and socket e. Condyloid Review Question Which of the following types of synovial joint is found within the hip joint? a. Saddle b. Pivot c. Hinge d. Ball and socket e. Condyloid Joint Injuries Sprains Dislocations Bursitis Tendonitis Arthritis Synovitis