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Biomechanics > Quiz 3-cervical > Flashcards

Quiz 3-cervical Flashcards

1
Q

Which region of the spine has the most muscles associated with it?

A

The cervical spine

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2
Q

What is the most mobile region of the spine

A

Cervicals

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3
Q

What is the job of the cervical spine

A
  1. Maintaining head posture

2. Allowing great deal of mobility

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4
Q

What is the least distinct cure in the spine

A

Cervical

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5
Q

What type of curve is the cervical spine considered

A

Secondary (compensatory) curve

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6
Q

What is the most complex region of the axial Skelton?

A

Occiput-atlas-axis

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7
Q

What are the two articulations in the upper cervical spine

A

Atlanto-occipital

Atlanto-axial

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8
Q

True or false

The upper cervical spine has IVD

A

False

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9
Q

Look at diagram/chart on slide 37

A

Yay!!! Codee is a BITCH ASS NIGGA

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10
Q

What is the superior articular processes of the atlas

A

The lateral masses

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11
Q

What is the shape of the lateral masses

A

Peanut like

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12
Q

What is the positioning of the superior articular processes

A

Concave, face slightly medial

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13
Q

What is the structure named at the C0/C1

A

It is a “cuplike” structure

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14
Q

What allows for “little rotation” at C0/C1

A

Peanut shaped lateral masses

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15
Q

The shape of the articulation at C0/C1 favors what type of movements?

A

Theta X axis

Flexion-extension movement

The frame of reference for this movement is the occipital condyles

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16
Q

What is the range of motion in degrees of occipital-atlas of the x axis

A

14-35 degrees

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17
Q

Is axial rotation limited in occiput-atlas?

A

Yes

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18
Q

What is the Y axis rotation rang of occipital and atlas

A

4-8 degrees each side

19
Q

What is the Z axis rotation in the occiput-atlas junction in degrees

A

4-11 degrees ( induced in cadavers)

20
Q

Lateral flexion in the Z axis of occiput-atlas has…..

A

Not been demonstrated under physiological conditions

21
Q

What ligament limits the Z axis rotation of occiput-atlas

A

Alar ligament limits Z axis motion

22
Q

If Z axis rotation does occur in the occiput-atlas what is associated with it?

A

Coupled rotation in the opposite direction, this leads to rotation of the chin away from the side of lateral flexion

23
Q

Z axis rotation of occiput-atlas is not ________________ because occipital is ____________.

A

Physiological, unseated

24
Q

The inferior articular processes of atlas are what shape

A

Flat or slightly concave, face slightly medial

25
Q

The atlas-axis junction configuration of the cartilage creates a

A

Biconvex articulation

26
Q

The biconvexity of the atlas-axis results in how many degrees of combine X axis rotation

A

20 degrees

27
Q

What is IAR?

A

The instant axis of rotation of atlas around the dens

28
Q

Increasing the curvature of the dense ________ the amount of x axis rotation

A

Increases

29
Q

The role of C2 allows lots of ______ axis rotation

A

Y

30
Q

How many degrees of y axis rotation occurs at C1-C2

A

43 degrees plus or minus 5.5 degrees

31
Q

What ligament restrains y axis rotation at C1-C2 joint

A

Alar ligament

32
Q

Where does 50% of rotation of the neck occur

A

C1-C2

33
Q

What is the job of intra-articular meniscoids

A

Serve to keep a film of synovial fluid applied to those surfaces of the articular cartilages that are not in contact with one another

34
Q

What type of movement displaces the intra-articular meniscoids

A

Y axis rotation

35
Q

Rotation around the y axis for C1-C2 is coupled with what movement

A

Y translation

36
Q

Rotation around z axis is limited to

A

5 degrees

37
Q

Why is lateral bending limited in the C1-C2 junction

A

Alar ligaments and the bony anatomy

38
Q

Is there true translation around the x axis of C1-C2

A

No, there is only “apparent” translation

39
Q

As the head is laterally flexed the _______________ articular process takes on a _________ load.

A

Ipsilateral, greater

40
Q

When the head is laterally flexed C2 inferior articular surface slopes __________

A

Inferiorly

41
Q

When the head is laterally flexed the spinous of C2 rotates ___________

A

Towards the side of Convexity, aka rotates to the opposite side

42
Q

Look at diagram on slide 59,60,61

A

Codee likes to fuck guys HARD

43
Q

During lateral bending the spinous rotates to the ______

A

Contralateral side aka opposite side

44
Q

Where does more translation around the X axis occur in the cervical spine

A

In the upper cervical spine

Biomechanics (4 decks)

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