Articulations Flashcards

1
Q

What does the axial skeleton consist of? (3)

A
  1. Skull. 2. Spinal Column. 3. Ribs.
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2
Q

What does the appendicular skeleton consist of? (3)

A
  1. Upper and lower limbs. 2. Pectorial girdle. 3. Pelvic girdle.
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3
Q

What is another name for a joint?

A

An articulation.

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4
Q

What is an articulation?

A

Where bone meets another bone, cartilage, or teeth.

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5
Q

What are the different kinds of bone markings? (4)

A
  1. Bony Prominences. 2. Articular surfaces. 3. Depressions. 4. Openings.
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6
Q

What are the two kinds of immobile joints? What do they lack?

A
  1. Fibrous. 2. Cartilaginous. They lack joint cavities.
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7
Q

What are synovial joints?

A

Freely mobile diathroses.

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8
Q

Are synovial joints avascular or vascular?

A

Very vascularized.

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9
Q

What contains a joint capsule?

A

Synovial joints.

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10
Q

Synovial joints contain what kind of cartilage? Why?

A

They contain Articular cartilage aka Hyaline. Because it reduces friction and acts as a shock absorber.

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11
Q

What are the two layers of the articular capsule?

A
  1. Outer fibrous layer. 2. Inner synovial membrane.
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12
Q

What is the function of the outer fibrous layer?

A

Strengthens the joint.

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13
Q

What is the function of the inner synovial membrane?

A

Secretes synovial fluid to lubricate joint, reduce friction, and some shock absorption. Has limited macropahges too.

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14
Q

What are bursae? What is its function?

A

Sac containing synovial fluid. It decreases friction in a joint.

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15
Q

What are tendon sheaths? What is its function?

A

Elongated bursae around tendons. It decreases friction on tendon.

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16
Q

What factors influence joint stability? (3)

A
  1. Articular surfaces. 2. Ligaments. 3. Muscle tone.
17
Q

What do pivot joints allow for?

A

Monoaxial Rotation only.

18
Q

What movements are allowed for by saddle joints?

A

Biaxial Angular motion.

19
Q

What do condylar joints allow for?

A

Biaxial angular motion.

20
Q

What do hinge joints allow for?

A

Monaxial angular motion.

21
Q

What do ball-and-socket joints allow for?

A

Triaxial Angular motion, circumduction, and rotation.

22
Q

What are examples of angular movements? (4)

A
  1. Abduction. 2. Adduction. 3. Flexion. 4. Extension.
23
Q

What is abduction?

A

Movement away from the longitudinal axis of the body in the frontal plane.

24
Q

What is adduction?

A

Movement toward the axis or midline of the body as viewed in the anatomical position.

25
Q

What is flexion?

A

Movement in the anterior-posterior plane that decreases the angle between the bones of the joint.

26
Q

What is extension?

A

An increase in the angle between two articulating bones.

27
Q

What is pronation?

A

Moves the wrist and hand from the palm-facing-front position to the palm-facing-back position

28
Q

What is supination?

A

Rotation of the forearm so that the palm face anterorly.

29
Q

What is eversion?

A

A motion of the foot that turns the sole outward.

30
Q

What is inversion?

A

Turning the sole inward.

31
Q

What is dorsiflexion?

A

Upward movement of the foot through flexion at the ankle.

32
Q

What is plantar flexion?

A

Ankle extension; toe pointing.

33
Q

What is lateral flexion?

A

When the vertebral column bends to the side.

34
Q

What is protraction?

A

Moving a part of the body anteriorly in the horizontal plane.

35
Q

What is retraction?

A

Movement posteriorly in the horizontal plane.

36
Q

What is opposition?

A

a special movement of the thumb that produces pad-to-Pad contact of the thumb with the palm or any other finger.

37
Q

What is reposition?

A

The opposite movement of opposition that returns the thumb and fingers to their normal position.

38
Q

What is elevation?

A

Movement in a superior, or upward, direction.

39
Q

What is depression?

A

Inferior (downward) movement of a body part.