Podcast
Questions and Answers
Label the parts of the ______.
Label the parts of the ______.
syndesmosis
Which feature of the hip joint makes it more stable than the glenohumeral joint?
Which feature of the hip joint makes it more stable than the glenohumeral joint?
Deeper Joint Socket
Which of the following joints is the least stable?
Which of the following joints is the least stable?
- Knee joint
- Hip joint
- Elbow joint
- Glenohumeral (shoulder) joint (correct)
The joint capsule has an inner layer called the?
The joint capsule has an inner layer called the?
Where is synovial fluid found?
Where is synovial fluid found?
When making a fist, the fingers are?
When making a fist, the fingers are?
Which action describes turning the sole of the foot medially, as in checking the bottom of a shoe for gum?
Which action describes turning the sole of the foot medially, as in checking the bottom of a shoe for gum?
Articulations involve only the point of contact between bones and other bones.
Articulations involve only the point of contact between bones and other bones.
In a gliding joint, the angle between bones does not change.
In a gliding joint, the angle between bones does not change.
Which fibrous joint allows for slight movement and the articulating bones are joined by long strands of dense regular connective tissue?
Which fibrous joint allows for slight movement and the articulating bones are joined by long strands of dense regular connective tissue?
The temporomandibular joint is limited to protraction and retraction due to its articular disc.
The temporomandibular joint is limited to protraction and retraction due to its articular disc.
From a relaxed, standing position, as you bring your arms up laterally so that they are straight out from your sides to stretch in the morning, the motion of the arms is called ____________. When you put your arms straight back down to your sides and then reach both hands up to rub your eyes, the motion that results at the elbow joint is called __________.
From a relaxed, standing position, as you bring your arms up laterally so that they are straight out from your sides to stretch in the morning, the motion of the arms is called ____________. When you put your arms straight back down to your sides and then reach both hands up to rub your eyes, the motion that results at the elbow joint is called __________.
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Study Notes
Joint Types and Structures
- Syndesmosis refers to a fibrous joint allowing slight movement, connected by long strands of dense regular connective tissue; example includes the radius and ulna articulation.
- Synovial joints, like glenohumeral and hip joints, feature a synovial cavity filled with synovial fluid, secreted by the synovial membrane.
- Glenohumeral (shoulder) joint is the least stable joint due to its high mobility, contrasted by the stability of less mobile joints like skull sutures.
Joint Mechanics and Movements
- Hip joint's deeper socket enhances its stability compared to the shallower glenohumeral joint.
- Articulations refer to points of contact between bones, cartilage, or teeth, not just between bones.
- Inversion action turns the sole of the foot medially, useful for checking shoewear.
- Flexion occurs when fingers are curled into a fist, moving from an extended position to a completely flexed one.
Joint Motion Types
- Gliding joints maintain a constant angle between bones during movement, classified as true.
- Temporomandibular joint (TMJ) allows multiple motions beyond just protraction and retraction due to its hinge and gliding nature.
- Arm movements from a standing position to lateral sides represent abduction, while lowering arms and reaching up cause flexion at the elbow joint.
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