Intro Basic Concepts Flashcards

1
Q

What are the forces that produce motion at a joint?

A

Gravity and muscle contraction

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2
Q

What is a force that causes a desired motion?

A

Prime mover or agonist

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3
Q

What is a force that causes a motion opposite the desired motion?

A

Antagonist

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4
Q

What are the functions of synergistic muscles?

A

Stabilize joints and neutralize undesirable motions

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5
Q

What is a basic functional unit of each muscle?

A

Motor unit

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6
Q

What is a motor unit composed of?

A

Single motor neuron + muscle FIBER it supplies

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7
Q

What is an isotonic contraction?

A

Shortening/concentric

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8
Q

What is a static contraction?

A

Isometric

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9
Q

What is a lengthening contraction?

A

Eccentric

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10
Q

What are the two major parts of the CNS?

A

Brain + spinal cord

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11
Q

What is a peripheral nerve?

A

Group of nerve fibers (axons + supporting cells) located outside CNS

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12
Q

What is a cranial nerve?

A

Peripheral nerve arising from brain

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13
Q

What is a spinal nerve?

A

Peripheral nerve from spinal cord

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14
Q

How is a gross spinal nerve formed?

A

Dorsal + ventral roots from segment of spinal cord combine to form spinal nerve

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15
Q

How long is a typical spinal nerve and how does it terminate?

A

1 cm long, dorsal and ventral ramus

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16
Q

What are the two kinds of terminal branches of peripheral nerves from rami?

A

Muscular branches + cutaneous branches

17
Q

What is efferent?

A

Motor (Away from CNS)

18
Q

What is afferent?

A

Sensory (Towards CNS)

19
Q

What nerve fiber in dorsal root?

A

Sensory

SAME DAVE

20
Q

What nerve fiber in ventral root?

A

Meotor

21
Q

What nerve fiber in spinal nerves?

A

Sensory and motor

22
Q

What nerve fiber in dorsal rami?

A

Sensory and motor

23
Q

What nerve fiber in ventral rami?

A

sensory and motor

24
Q

Where are cell bodies for afferent fibers?

A

Dorsal root ganglion

25
Q

Where are the cell bodie for efferent fibers?

A

spinal cord gray mater

26
Q

What is somatic?

A

Body wall + extremities

27
Q

What is visceral?

A

Internal organs + glands, vessels

28
Q

What is a dermatome?

A

The area of skin supplied by single spinal nerve

29
Q

What is a dermatome supplied by?

A

Both dorsal + ventral ramus of spinal nerve

30
Q

How are Xray films viewed?

A

Always as if you are facing the patient

Right Left

31
Q

What is radiolucent?

A

Dark, thin areas

32
Q

What is radio dense?

A

White, light areas of Xray, dense

33
Q

What are five major categories of radio dense materials on X-ray?

A
Air/gas
Fat
Soft tissue
Bone
Metal
34
Q

How are follow structures visualized?

A

Radiopaque or radiolucent contrast materials

35
Q

What is an advantage of CT vs conventional radiograpghy?

A

Enhanced discrimination of tissues w/ only small differences in radiodensity

Sectional images overcome superimposition