Classification of Joints Flashcards
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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?

<p>True</p> Signup and view all the answers

The amphiarthrodial joint is divided into which three types?

<p>Syndesmosis, Symphysis, Synchondrosis</p> Signup and view all the answers

Is the diarthrodial joint moveable?

<p>True</p> Signup and view all the answers

What is the diarthrodial joint also known as?

<p>Synovial joint</p> Signup and view all the answers

What is the joint capsule?

<p>A sleeve-like covering of ligamentous tissue that surrounds the bony ends forming the joints.</p> Signup and view all the answers

What is the joint cavity?

<p>The cavity that secretes synovial fluid to lubricate the area inside the joint capsule.</p> Signup and view all the answers

What are the six diarthrodial joints?

<p>Arthrodial, Ginglymus, Trochoid, Condyloid, Enarthrodial, Sellar</p> Signup and view all the answers

How is the arthrodial joint characterized?

<p>Two plane or flat bony surfaces which butt against each other, permits limited gliding movement.</p> Signup and view all the answers

What is the arthrodial joint also known as?

<p>The gliding joint</p> Signup and view all the answers

How is the ginglymus joint characterized?

<p>A uniaxial articulation, allows motion in one plane.</p> Signup and view all the answers

Where would you find the ginglymus joint?

<p>Knee or elbow</p> Signup and view all the answers

How is the trochoid joint characterized?

<p>Uniaxial articulation.</p> Signup and view all the answers

What is the trochoid joint also known as?

<p>Pivot, Screw joint</p> Signup and view all the answers

Where would you find the trochoid joint?

<p>The proximal and distal radio-ulnar joints</p> Signup and view all the answers

How is the condyloid joint characterized?

<p>Biaxial ball and socket joint with oval concave surfaces.</p> Signup and view all the answers

Where would you find the condyloid joint?

<p>Knuckle joints or wrist articulation between the radius and carpals</p> Signup and view all the answers

What type of movement does the condyloid joint perform?

<p>Flexion, extension, abduction, adduction (circumduction)</p> Signup and view all the answers

What is another name for the condyloid joint?

<p>Knuckle joint</p> Signup and view all the answers

How is the enarthrodial joint characterized?

<p>Multiaxial or triaxial ball and socket joint with a bony round head fitting into a concave surface.</p> Signup and view all the answers

What is the enarthrodial joint also known as?

<p>Ball and socket joint</p> Signup and view all the answers

What are the motions of the enarthrodial joint?

<p>Flexion, extension, abduction, adduction, diagonal abduction &amp; adduction, rotation, and circumduction</p> Signup and view all the answers

Where would you find the enarthrodial joint?

<p>The hip and shoulder joint</p> Signup and view all the answers

How is the seller joint characterized?

<p>Unique triaxial joint with 2 reciprocally concave and convex articular surfaces.</p> Signup and view all the answers

What is the seller joint also known as?

<p>Saddle joint</p> Signup and view all the answers

What is the motion of the seller joint?

<p>Flexion, extension, adduction &amp; abduction, circumduction and slight rotation</p> Signup and view all the answers

The _____ mobile a joint, the _______ stable.

<p>more, less</p> Signup and view all the answers

What is Davis' Law?

<p>Ligaments, muscles, and other soft tissue when placed under appropriate tension will adapt over time by lengthening; conversely, when maintained in a loose or shortened state over time, they will gradually shorten.</p> Signup and view all the answers

What are the 5 major factors that joints depend on?

Signup and view all the answers

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.

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