Unit 3 - Articular System Flashcards
joint is an immovable joint
Synarthrosis
joint is a slightly movable joint
Amphiarthrosis
joint is a freely movable joint
Diarthosis
Synarthroses
Four major types:
Suture: Located in the bones of the skull
Gomphosis: Connection between a tooth and its socket
Synchondrosis: Epiphyseal cartilage in long bones
Synostosis: Are totally immovable joints
Amphiarthroses
Two major types:
Syndesmosis: A ligament band connecting bones (tibia and fibula or ulnar and radius)
Symphysis: Bones are separated by a wedge or a pad of fibrocartilage (pubis and intervertebral discs)
Located in the bones of the skull
suture
Connection between a tooth and its socket
gomphosis
Epiphyseal cartilage in long bones
Synchondrosis
Are totally immovable joints
Synostosis
A ligament band connecting bones (tibia and fibula or ulnar and radius)
Syndesmosis
Bones are separated by a wedge or a pad of fibrocartilage (pubis and intervertebral discs)
Symphysis
The components that make up a synovial joint are:
Fibrous articular capsule Synovial cavity Synovial membrane Haversian fat pads Articular (hyaline) cartilage Ligaments Tendons Bursae
The synovial membrane contains ____ and ______ which make up the synovial fluid.
phagotic cells and B cells
A joint that allows movement in only one axis is called
Monaxial.
A joint that allows movement in along two different axes is called
Biaxial.
A joint that permits a combination of angular movement and rotation is called
Triaxial or Multiaxial.
synovial joints can be classified as
liding, hinge, pivot, ellipsoidal, saddle, or ball-and-socket.
Range of Motion is restricted by:
Skeletal Structures
Ligaments
Muscles
is a rigid structure, such as a bone, that moves at a fixed point called a fulcrum.
lever
There are three classes of levers found in the human body:
1) First-Class Lever: The fulcrum lies between the applied force and the resistance (e.g triceps insertion at the elbow)
2) Second-Class Lever: The resistance is located between the applied force and the fulcrum (e.g. plantar flexors inserion at the ankle)
3) Third-Class Lever: A force is applied between the applied force and the fulcrum (e.g. biceps insertion at the elbow)
The fulcrum lies between the applied force and the resistance (e.g triceps insertion at the elbow)
first class lever
The resistance is located between the applied force and the fulcrum (e.g. plantar flexors inserion at the ankle)
Second-Class Lever
A force is applied between the applied force and the fulcrum (e.g. biceps insertion at the elbow)
third class level
Attaches the vertebral bodies to each other
Anterior and Posterior Longitudinal Ligaments
Connects the vertebral arches (laminae) of adjacent vertebrae
Ligamentum Flava
Connects the spinous processes of adjacent vertebral
Interspinous Ligaments
Cross over and attaches the ends of the spinous processes
Supraspinous Ligaments
Monaxial and allows flexion and extension
Atlanto-occipital joint
Monaxial and pivot joint, allowing rotation.
Atlanto-axial joint
Attaches the dens to the foramen magnum area
Alar Ligament
Attaches the heads of ribs to the vertebral bodies (costovertebral, diarthrosis)
Attaches cartilage to the sternum (sternocostal)
Radiate Ligaments
attaches the necks of ribs to the transverse processes of the vertebrae (costovertebral)
Costotransverse ligaments
A diarthrosis joint
Sternoclavicular Joint
Sternoclavicular Ligament
A synarthrosis joint
Coracoclavicular Joint
Coracoclavicular Ligament
A diarthrosis joint
Acromioclavicular Joint
Acromioclavicular Ligament
A multiaxial, ball-and-socket joint.
shoulder joint
Shoulder Joint: A multiaxial, ball-and-socket joint.
Components involved include:
Glenohumenal Ligament Coracohumeral Ligament Coracoacromial ligament Coracoclavicular Acromioclavicular Glenoid labrum: deepens the socket Rotator Cuff Muscles: support joint and limit the range of motion
Acts as a secondary socket to the shoulder joint
Coracoacromial Arch
Coracoacromial Arch: Acts as a secondary socket to the shoulder joint
Components involved include:
Coracoacromial Ligament
Subacromial bursa: Reduces supraspinatus friction
Elbow Joint: Is a monoaxial, hinge joint
Components involved include:
ollateral Ligaments: Ulnar and radial
Annular Ligament: Binds the radial head to the ulna
Subcutaneous bursae: Under-lying the olecranon process
Is a monoaxial, hinge joint
elbow joint
A monaxial joint that provides rotation
Radio-Ulnar Joint:
Radio-Ulnar Joint: A monaxial joint that provides rotation
Annular Ligament
Interosseous membrane: A fibrous connective tissue membrane between the shafts of the ulnar and radius
A fibrous connective tissue membrane between the shafts of the ulnar and radius
Interosseous membrane
A ellipsoidal, biaxial joint
Radiocarpal Joint (wrist):
Collateral Ligaments
A diarthrosis joint
Midcarpal Joint
are biaxial except for specialization at the thumb which is a multiaxial, saddle joint
Carpometacarpal Joints
Metacarpophalangeal Joints (knuckles): Components involved include:
Palmar Ligaments: Reduces tendon friction
Transverse Liaments: Binds metacarpal heads
Collateral ligaments: Helps us to make a fist
Reduces tendon friction
Palmar Ligaments
Binds metacarpal heads
Transverse Liaments
Helps us to make a fist
Collateral ligaments
Are monaxial hinge joints
Interphalangeal Joints
Interphalangeal Joints: Are monaxial hinge joints
Components involved include:
Palmar Ligaments
Collateral Ligaments
Sacroiliac Joint: The anterior portion is diarthrosis, and the posterior portion is synarthrosis
Components involved include:
Interosseous Sacroiliac Ligament
Iliolumbar Ligament
The joint is formed by fibrocartilage
Symphysis Pubis
Hip Joint: Is a multiaxial, ball-and-socket joint
Components involved include:
Acetabular Labrum: Increases the depth of the joint cavity
Transverse Ligament of the Acetabulum: Fills the gap in the inferior border
Iliofemoral Ligament: Reinforce the articular capsule
Ischiofemoral Ligament: Reinforce the articular capsule
Pubofemoral Ligament: Reinforce the articular capsule
Head Ligament or Ligamentum Teres: Tense when hip is flexed or undergoes lateral rotation
Knee Joint: Is a monaxial, hinge joint
Components involved include:
Medial and Lateral Meniscus: Acts as a cushion, that conforms to the articulating surface and provides stability
Anterior Cruciate Ligaments: Prevents anterior dislocation of tibia
Posterior Cruciate ligaments: Prevents posterior dislocation of tibia
Medial and Lateral Collateral Ligaments: Reinforce the medial and lateral surfaces of the knee
Bursae: Reduces the friction
Acts as a cushion, that conforms to the articulating surface and provides stability
Medial and Lateral Meniscus:
Prevents anterior dislocation of tibia
Anterior Cruciate Ligaments
Prevents posterior dislocation of tibia
Posterior Cruciate ligaments
Reinforce the medial and lateral surfaces of the knee
Medial and Lateral Collateral Ligaments
Reduces the friction
Bursae
Tibiofibular Joint: Is a syndesmosis joint
Components involved include:
Interosseus Membrane: A fibrous connective tissue membrane between the shafts of the tibia and fibula
Interosseous tibofibular ligaments: Provide distal support
A fibrous connective tissue membrane between the shafts of the tibia and fibula
Interosseus Membrane
Provide distal support
Interosseous tibofibular ligaments
Talocural Joint (ankle): Is a monaxial, hinge joint Components involved include:
Talofibular Ligament (weaker ligaments: lateral side) Calcaneofibular Ligament (weaker ligaments: lateral side) Deltoid Ligament (strongest ligament: medial side) Posterior Transverse Tibiofibular Ligament