Questions and Answers
What are the three major classifications of joints?
Synarthrodial, Amphiarthrodial, Diarthrodial
Is the synarthrodial joint moveable?
False
The synarthrodial joints are divided into which two types?
Sutures of the cranial bones, Gomphosis found in the sockets of the teeth
Is the amphiarthrodial joint moveable?
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The amphiarthrodial joint is divided into which three types?
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Is the diarthrodial joint moveable?
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What is the diarthrodial joint also known as?
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What is the joint capsule?
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What is the joint cavity?
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What are the six diarthrodial joints?
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How is the arthrodial joint characterized?
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What is the arthrodial joint also known as?
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How is the ginglymus joint characterized?
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Where would you find the ginglymus joint?
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How is the trochoid joint characterized?
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What is the trochoid joint also known as?
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Where would you find the trochoid joint?
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How is the condyloid joint characterized?
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Where would you find the condyloid joint?
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What type of movement does the condyloid joint perform?
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What is another name for the condyloid joint?
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How is the enarthrodial joint characterized?
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What is the enarthrodial joint also known as?
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What are the motions of the enarthrodial joint?
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Where would you find the enarthrodial joint?
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How is the seller joint characterized?
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What is the seller joint also known as?
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What is the motion of the seller joint?
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The _____ mobile a joint, the _______ stable.
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What is Davis' Law?
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What are the 5 major factors that joints depend on?
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Study Notes
Classification of Joints
- Joints are classified into three major types: synarthrodial, amphiarthrodial, and diarthrodial.
Synarthrodial Joints
- Synarthrodial joints are immoveable.
- They are divided into two types:
- Sutures found in cranial bones
- Gomphosis located in the tooth sockets
Amphiarthrodial Joints
- Amphiarthrodial joints allow slight movement.
- Types include:
- Syndesmosis: joints held together by strong ligaments, permitting minimal movement
- Symphysis: separated by a fibrocartilage pad, allowing very slight movement
- Synchondrosis: separated by hyaline cartilage
Diarthrodial Joints
- Diarthrodial joints are moveable and are also known as synovial joints.
- Characterized by a joint capsule, which encases the bony ends with ligamentous tissue.
Joint Cavity
- The joint cavity secretes synovial fluid to lubricate the space within the joint capsule.
Types of Diarthrodial Joints
- Six main types:
- Arthrodial (gliding joint)
- Ginglymus (hinge joint)
- Trochoid (pivot joint)
- Condyloid (ellipsoid joint)
- Enarthrodial (ball and socket joint)
- Sellar (saddle joint)
Arthrodial Joints
- Consist of two plane or flat bony surfaces, permitting limited gliding movement.
Ginglymus Joints
- Uniaxial articulation, allowing motion in one plane.
- Found in the knee and elbow.
Trochoid Joints
- Uniaxial articulation, also known as pivot or screw joints.
- Located in the proximal and distal radio-ulnar joints.
Condyloid Joints
- Biaxial ball and socket joint with oval concave surfaces permitting various movements:
- Flexion, extension, abduction, adduction (circumduction)
- Found in knuckles and wrist (radius and carpals).
Enarthrodial Joints
- Multiaxial or triaxial ball and socket joints with a round head fitting into a concave surface.
- Allow comprehensive movement: flexion, extension, abduction, adduction, rotation, and circumduction.
- Examples include the hip and shoulder joints.
Seller Joints
- Unique triaxial joints characterized by reciprocally concave and convex surfaces.
- Known as saddle joints.
- Movements include flexion, extension, adduction, abduction, circumduction, and slight rotation.
Stability vs. Mobility
- The more mobile a joint is, the less stable it becomes, and vice versa.
Davis' Law
- States that ligaments, muscles, and soft tissues adapt to changes in length based on tension; they lengthen under appropriate tension and shorten when maintained in a loose or shortened state over time.
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Description
Test your knowledge on joint classification with these flashcards. Learn about the three major types of joints: synarthrodial, amphiarthrodial, and diarthrodial, along with their characteristics. This quiz will help reinforce your understanding of joint types and their movements.
