Articulation Flashcards
What is the study of articulation?
Anthropology
What is a place of contact between bone & bone, bone & cartilage, bones & teeth?
Joint/ Articulation
What is the relationship between mobility and stability of a joint?
+MOBILITY=-STABILITY
-MOBILITY=+STABILITY
What are the 3 structural categories of joints?
- fibrous
- cartilaginous joints
- synovial joints
What type of joint is made of dense irregular synarthrosis CT?
Fibrous joint
Name the 3 different types of fibrous joints
- Gomphoses
- Sutures
- Syndesmoses
What membrane holds teeth in place? What joint is that a part of?
- Periodontal membrane.
- gomphoses
What type of joint is immobile?
Synarthrosis
What type of joint is slightly mobile?
Amphiarthrosis
What type of joint is completely mobile?
Diarthosis
What type of fibrous joint holds skull bones together and morph with age?
Sutures
What are fused sutures called?
synostoses
What fibrous joint is amphiarthroses interosseous membrane between bones?
EX) radius & ulna, tibia & fibula
Syndesmoses
What joint holds the sides of bones together?
interosseous membrane (interosseous ligaments)
What joint is held together by cartilage?
Cartilaginous joint
What are the 2 types of cartilaginous joints?
- Synchondroses
- Symphyses
What joint is made out of synarthrosis hyaline cartilage? Where can it be located?
Synchondroses. Ex) immature/child skeleton Ex) Epiphyseal plate Ex) sphenoid & basilar part of occipital Ex) first sternocostal joint Ex) costochondral joints
What joint is between ribs &
differ from articulation between ribs 2-7 (synovial joint)
Synchondroses costochondral joints
What amphiarthroses fibrocartilagenous joint resist tension & stress between articulating bone means growing together ?
Where is it located?
- Symphyses
- Ex) intervertebral discs, pubic symphysis
What diarthrosis articular cartilage separates joint cavities?
Synovial joints
What small space hold synovial fluid?
Joint cavity
What is the main function of synovial joints?
Fluid-Filled cavities prevent friction between articulating surfaces
Name the 3 functional differences of joints
- Synarthrosis
- Amphiarthroses
- Diarthrosis
What is synovial fluid?
synovia: viscid lubricating fluid secreted by the membrane lining joints and tendon sheaths etc.
What random fibrous synovial membrane sack hold synovial fluid & reduces friction?
Bursa (purse)
What are the 7 features of synovial joints?
1) Articular Capsule
2) Joint Cavity
3) Synovial Fluid
4) Articular Cartilage
5) Ligaments
6) Nerves
7) Blood
What is the weakest part of a skeleton?
Joints
What joints get injured more easily?
Loosely fitted joints
What joints are the strongest?
Tightly fitted joints
How do we classify the structure of a joint?
Based on binding materials holding joint together (CT & Spaces)
How do we classify the function of a joint?
Based on type of movment allowed
What type of joint is most immovable?
Gomphoses Fibrous Joint
What are Synchondroses Cartilaginous Joints made of?
Hyaline Cartilage
What is the function of Synovial Joints?
Diarthrosis
What cartilage are Synovial Joints composed of?
Articular Cartilage (Hyaline)
What elongated bursa relieves stressed tendons?
(wrist, hand, fingers, ankle)
Tendon Sheath of Synovial Joint
What do tendons do?
Help stabilize joint
What is the basic structure of synovial joints?
Outer: Dense Irredular CT
Inner: Loose CT (synovial membrane)
What small space holds synovial fluid in a synovial joint?
Joint cavity (articular cavity)
What periphery of synovial joint protects and fills in spaces when gap opens as joint is moved?
“bubble wrap”
Fat Pad
What type of movement moves a synovial joint on 1 axis?
Uniaxial
What type of movement moves a synovial joint on 2 axis?
Biaxial
What type of movement moves a synovial joint on multiple axis?
Multiaxial
What type of moving joint do intercarpals & intertarsal, hamate & Triquetrum have?
Planar (Gliding) Joint
uniaxial
What uniaxial, articulating, synovial joint fits into articulting depressions? Where are they located?
Hinge Joint
EX) trochlea of humerus
What uniaxial, synovial joint rotates the dens of axis on vertebrae?
Pivot Joint
EX) head of radius & radial notch. atlas & axis
What biaxial synovial joint moves by an oval fitting into an articulating depression?
EX) Jaw. scaphoid & lunate w/ radius
Condyloid Joints
What multiaxial synovial joint does the ball of femur in acetabulum represent?
Ball-and-socket joint
What extension goes beyond 180 degrees?
Hyperextension
What “stretching out” motion INCREASES angle between articulating bones?
Extension
What motion DECREASES angle between articulating bones?
Flexion
What movement moves the trunk side-to-side?
Lateral Flexion
What movement involves a part “moving away” from the midline?
Abduction
What movement involves a part “moving towards” the midline?
Adduction
What movement does the shoulder “drawing a cone” represent?
Circumduction
What rotation does the head & neck make when it moves away from the median?
Lateral Rotation: (external rotation)
What rotation do the hands make when in anatomical position?
Supination
What rotation does the head make when moving towards the median?
Medial Rotation: (internal rotation)
What position do the hands make with palms flat facing back?
Pronation
What movement do the shoulders make when relaxed?
Depression
What movement do the shoulders make when raised?
Elevation
What movement does the ball of foot & toes make when the ankle moves foot up?
Dorsiflexion
What movement do the ball of foot & toes make when the foot moves down?
Plantar Flexion
What movement happens when the ankle rotates in?
Inversion
What movement does the foot make when rotating out?
Eversion
What movement involves the head moving forward?
Protraction
What movement involves the head moving backwards?
Retraction
What movement do the thumb and pink make when they cross? (Boyscouts)
Opposition
What synovial joint is located between the mandible and mandibular fossa of the temporal bone?
Temporomandibular Joints
What type of movements do the Temporomandibular Joints (TMJ) make?
gliding, hinge, pivot
What type of synovial joint lies I between each vertebrae of the spinal column?
Intervertebral discs
What synovial joint connects the Manubrium of Sternum>Sternal End of Clavicle? What type of joint is it?
Sternoclavicular Joints
saddle-joint
What shallow joint separates Head of Humerus> Glenoid Cavity of scapula?
What type of joint is this?
Glenohumeral (shoulder) Joints
Type: Ball-and-socket
What synovial joint is located at the wrist?
Radiocarpal Joint
What type of movement can the hip joint make?
flexion, extension, abduction, adduction, rotation, circumduction
What prevents hyperflexion of knee & displacement of tibia?
posterior curicate ligament (PCL)
What part of the knee sperates posterior femur>anterior tibia and Prevents hyperextension?
anterior curicate ligament: (ACL)
What type of joint is the Talocural (ankle) joint?
Hinge joint
What is the largest diarthrosis/ hinge joint?
Knee joint
What type of movement does the glenohumeral joint?
flexion, extension, abdution, adduction