Chapter 9 Flashcards
Structural Classification of Joints
Joints can be classified into three main types based on their structure: fibrous, cartilaginous, and synovial.
Types of Synarthrosis
Immovable joints (e.g., sutures in the skull).
Types of Diarthrosis
Freely movable joints (e.g., shoulder, knee).
Types of Syndesmosis
Slightly movable joints (e.g., tibiofibular joint).
Types of Amphiarthrosis
Slightly movable joints (e.g., pubic symphysis).
Types of Synostosis
Fused joints (e.g., fusion of certain cranial bones).
Example of a Synchondrosis
The articulation of the first rib with the sternum.
Example sentence.
Intervertebral Disc Joint Classification
This joint is classified as a symphysis.
Four Major Types of Synarthrotic Joints
Sutures, gomphoses, synchondroses, and synostoses.
Pubic Symphysis Classification
Structurally, it is classified as a cartilaginous joint (symphysis).
Damaged Articular Cartilage
It can lead to pain and reduced movement; the surface can become rough or uneven.
Functions of Synovial Fluid
Lubrication, nourishment, shock absorption. Synovial joints are characterized by a joint capsule, articular cartilage, and a synovial membrane.
Bursae
Fluid-filled sacs that reduce friction between tissues, commonly found around joints like the shoulder and knee.
Accessory Synovial Structure
Examples include menisci and bursae.
Functions of Fat Pads
Provide cushioning and fill spaces in joints.
Functions of Menisci
C-shaped cartilage structures that improve fit between bones in a joint, enhancing stability.
Definition of Fracture
A break in a bone.
Definition of Bunion
A bony bump on the joint of the big toe.
Definition of Bursitis
Inflammation of a bursa.
Definition of Dislocation
Displacement of a bone from its joint.
Definition of Sprain
Stretching or tearing of ligaments.
Intracapsular vs. Extracapsular Ligament
Intracapsular ligaments are located within the joint capsule (e.g., ACL), while extracapsular ligaments are located outside the capsule (e.g., LCL).
Stabilizing Factors of Synovial Joints
Ligaments, tendons, muscle tone, and the shape of articulating surfaces.
Types of Condylar Joint
Example: Metacarpophalangeal joint.
Types of Hinge Joint
Example: Elbow.
Types of Saddle Joint
Example: Carpometacarpal joint of the thumb.