Lecture 5: Joints Flashcards
Classify joints in terms of functionality?
- → Synarthrosis (NO movement)*
- → Diarthrosis (Lots of movement)*
- → Amphiarthrosis (Semi-mobile)*
Classify joints structurally:
→ Fibrous
→ Cartilaginous
→ Synovial
Define what a joint is and the relationship between mobility and stability:
A joint is a physical contact btw 2 bones, bone and cartilage or bone and tooth
→ Increased mobility = Decreased stability ………. Decreased mobility = Increased stability
What is the decrease in angle your elbow and increase in angle of your elbow joint = to.
Flexion and Extension (respectively)
What is the movement away from the midline called (1)
What is the movement towards the midline called (2)
(1) Abduction (Lateral movement)
(2) Adduction (medial movement)
What is the turning movement of the Atlanta-axial joint called in the cervical vertebrae called.
Rotation
What is the combination of movements of flexion + extension + abduction + adduction called. Give an example of a joint that does this
Circumduction done by the shoulder joint.
What is the up and down movement of the temporomandibular joint called?
Elevation + Depression
What is the forward + backwards movement of the temporomandibular joint called?
Protraction + Retraction
Name what movement occurs when the soles of the feet meet and don’t meet. Name this joint:
Inversion and Eversion (occurs at the intertarsae joint)
Name the movement where your toes are faced up vs your toes are faced down. Where does this occur?
Dorsiflexion + Plantarflexion (at ankle joint)
What joint is responsible for the palms down and palms up gesture. What movement is this?
Radioulnar joint: Pronation and Supination
What is the movement of the thumb which allows it to touch its other digests. What is this joint called.
Opposition: Carpometacarpal joint
What is the role of the synovial cavity, and which joints are they located in.
The role of the synovial cavity is to reduce friction between joints and absorb shock. It is filled with a synovial fluid composed of interstitial fluids and hyaluronic acid.
→ Located in Synovial diarthrosis joints.
What are fibrous joints held together by? Name three examples and classify their functionality.
Fibrous joints are held together by dense regular connective tissue.
→ Wormian Sutures (in the skull) Synarthrotic
→ Syndesmoses (interserrous membrane) Amphiarthrotic
→ Gomphoses (Tooth and areolar process ) Synarthrotic
