Arthrology Flashcards

1
Q

What is a joint?

A
  • union bw 2 or more bones
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2
Q

What is a joint classified by?

A
  • histology (tissue type: fibrous, cartilaginous, synovial)
  • amt of movement available (immobile, slightly mob, freely mob)
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3
Q

Structure of Fibrous joints

A
  • bones are connected by dense fibrous CT, with little or no movem bw the bones
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4
Q

Eg of Fibrous joint

A
  • suture
  • syndesmosis
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5
Q

Fibrous joint - Suture

where is it found?
structure?
movement?

A
  • F: skull
  • S: bones linked by short fibres of CT
  • M: no movement
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6
Q

Fibrous joint - Syndesmosis

where is it found?
structure?
movement?

A
  • F: forearm + leg
  • S: bones are linked by longer bands of CT
  • M: slightly mobile
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7
Q

Structure of Cartilaginous Joints

A
  • bones are united by cartilage. There are two types: primary (synchondroses) and secondary (symphyses).
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8
Q

Cartilaginous joints - Primary / Synchondrosis

where is it found?
structure?
movement?

A
  • F: epiphyseal plates (where bone growth occurs)
  • S: hyaline cartilage, eventually ossifies
  • M: immob
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9
Q

Cartilaginous joints - Secondary / Symphysis

where is it found?
structure?
movement?

A
  • F: pubic symphysis, intervertebral discs
  • S: bones joined by fibrocartilage
  • M: slightly mobile
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10
Q

Hip Joint

What is a synovial joint?

What movement?

A
  • joint cavity containing lubricating synovial fluid
  • freely movable
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11
Q

Eg of Synovial joints

A
  • ball and socket (hip joint)
  • hinge (elbow)
  • pivot (bw C1 + C2 vertebrae)
  • saddle (thumb)
  • condyloid (wrist)
  • plane/gliding joint (tarsal)
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12
Q

What is a uniaxial movement?

A
  • 1 pair of movement eg. hinge, pivot
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13
Q

What is a multi-axial movement?

A
  • 3 pairs of movements eg. ball + socket, plane
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14
Q

Active movement

A
  • produced by muscle contraction
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15
Q

Passive movement

A
  • produced by an ext force
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16
Q

Passive physiological movement

A
  • movement can also be produced actively
17
Q

Passive accessory

A
  • movement X be produced actively
  • moving articular surfaces w in a joint capsule
18
Q

Angular Movements

A
  • flexion + extension
  • adduction + abduction
19
Q

Rotational Movements

A
  • med/lat rotation
  • pronation + supination
20
Q

Roll

A
  • new point on one surface comes in contact w a new point on the other
21
Q

Spin

A
  • rotation around a fixed axis
22
Q

Slide

A
  • one surface moves linearly across another
23
Q

What is the Closed Packed Position?

A
  • ⬆est surface area of artiuclar surfaces
  • lig + cap = taut
  • extension

t/f.. ⬆ stab w ⬇ effort

hip: ext, med rot, abd

24
Q

What is congurency?

A
  • ⬆️est surface area contact bw 2 bones

hip: flexion, ext rot, abd

25
Q

Structure of Ligaments

A
  • bands of fibrous CT that join bones together in joints
26
Q

Functions of Ligaments

A
  1. joint stability
  2. absorb shock
  3. limit excessive movement
  4. proprioception
27
Q

Types of ligaments

A
  1. Intra-capsular (deep to capsule)
    eg. ACL + PCL
  2. Capsular (re-enforces capsule)
    eg. ilio femoral ligament
  3. Extra-capsular (sits outside the capsule)
    eg. lateral collateral ligament
28
Q

Structure of Bursae

A
  • synovial fluid-filled sacs
29
Q

Function of Bursae

A
  • reduce friction
30
Q

Structure of Articular Discs

A
  • fibrocartilaginous pads bw articular surfaces of some synovial joints
31
Q

5 functions of Articular Discs

A
  • shock absorbers
  • permit diff movements to occur in the joint
  • aid mechanical fit
  • restrain movement
  • assist lubrication
32
Q

Structure of Joint capsule

A
  • encloses syn capsule
  • fibrous CT
33
Q

Function of Joint Capsule

34
Q

Structure of Synovial Membrane

A
  • lines int surface of articular caspule + covers acet labrum
35
Q

Function of Synovial Membrane

A
  • secrete syn fluid/ lubrication