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Medsci142 > Spine and Spinal Cord Structure > Flashcards

Spine and Spinal Cord Structure Flashcards

1
Q

Identify the Ventral and Dorsal sides of the Spinal Cord

A
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2
Q

Identify the Lateral Columns of the Spinal Cord

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3
Q

Identify the Ventral Columns of the Spinal Cord

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4
Q

Identify the Tracts of Lissauer in the Spinal Cord

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5
Q

Identify the Gracile and Cuneate Fasiculi/Columns in the Spinal Cord

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6
Q

Identify the Grey Matter in the Spinal Cord

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7
Q

Identify the Anterior White Commissure of the Spinal Cord

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8
Q

Identify the Dorsal Root Ganglia in the Spinal Cord

A
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9
Q

Identify the Ventral Roots of the Spinal Cord

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10
Q

Identify Lamina 1 and 2 of the Spinal Cord

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11
Q

Identify Lamina 3 and 4 of the Spinal Cord

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12
Q

Identify Lamina 8 and 9 of the Spinal Cord

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13
Q

What is the Approximate Diameter of the Spinal Cord?

A

1cm

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14
Q

What is the Cervical Enlargement?

A

A widening of the spinal cord corresponding to nerves coming from the arms

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15
Q

What is the Thoracolumbar Enlargement?

A

A widening of the spinal cord corresponding to nerves coming from the legs

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16
Q

The Termination of the Spinal Cord is called the…

A

Conus Medullaris

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17
Q

The Inner Most Spinal Meninx is called the…

A

Pia Mater

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18
Q

The Middle Spinal Meninx is called the…

A

Arachnoid Mater

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19
Q

The space between the Pia Mater and the Arachnoid Mater is filled with?

A

Cerebrospinal Fluid

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20
Q

The Outermost Spinal Meninx is called the…

A

Dura Mater

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21
Q

The Length of Connective Tissue that Anchors the Spinal Cord to the Coccyx is called the…

A

Filum Terminale

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22
Q

How Long is the Filum Terminale Internum?

A

Approximately 15cm

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23
Q

How Long is the Filum Terminale Externum?

A

Approximately 5cm

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24
Q

Identify the Pathway of Proprioception in the Spinal Cord which does Not Involve Convergence

A
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25
Q

Identify the Pathway of Proprioception in the Spinal Cord which Involves Convergence

A
26
Q

Where in the Spinal Cord do Neuron Cell Surfaces contain Opioid Receptors?

A
27
Q

Where in the Spinal Cord does Decussation occur in the Spinothalmic Tract?

A

Anterior White Commisure

28
Q

What is Convergence?

A

The outputing of hundreds of proprioception neurons onto a single neuron in laminas 3 and 4

29
Q

What is Proprioception

A

The sensing of touch, pressure and spatial awareness of limbs in relation to the body

30
Q

Lamina 3 and 4 are collectively Known As…

A

The Nucleus Proprius

31
Q

In the Homonculary Arranged Dorsal Columns, neurons carrying signals from the Lower Body (Toes, Knees, Hip) are arranged in the ____ Fasiculus, while neurons carrying signals from the Upper Body (Fingers, Arms, Neck) are arranged in the ____ Fasiculus

A

In the Homonculary Arranged Dorsal Columns, neurons carrying signals from the Lower Body (Toes, Knees, Hip) are arranged in the Gracile Fasiculus, while neurons carrying signals from the Upper Body (Fingers, Arms, Neck) are arranged in the Cuneate Fasiculus

32
Q

The Sensory Neurons entering the Dorsal Root Ganglion are ___ Neurons?

A

The Sensory Neurons entering the Dorsal Root Ganglion are Pseudounipolar Neurons?

33
Q

Meisner’s Corpuscles are ___ Receptors

A

Meisner’s Corpuscles are Touch Receptors

34
Q

Pacinian Corpuscles are ___ Receptors

A

Pacinian Corpuscles are Pressure​ Receptors

35
Q

Are First Order Medial Lemniscal System Neurons Myelinated?

A

Yes

36
Q

Are First Order Spinothalmic Tract Neurons Myelinated?

A

No

37
Q

First Order Medial Lemniscus System Neurons conduct signals at what Speed?

A

50m/s

38
Q

First Order Spinothalmic Tract Neurons conduct signals at what Speed?

A

1m/s

39
Q

Proprioception Receptors and Nerves are responsible for ___ Sensation

A

Proprioception Receptors and Nerves are responsible for Discriminative Sensation

40
Q

What is Discriminative Sensation?

A

Being able to tell two points of touch on the skin apart from each other

41
Q

Identify where the Medial Lemniscus is in the Medial Lemniscus System

A
42
Q

Identify where the Cuneate and Gracile Nuclei are in the Medial Lemniscus System

A
43
Q

Identify where the Internal Arcuate Fibres are in the Medial Lemniscus System

A
44
Q

Identify where the First Order Neurons are in the Medial Lemniscus System

A
45
Q

Identify where the Second Order Neurons are in the Medial Lemniscus System

A
46
Q

Identify where the Third Order Neurons are in the Medial Lemniscus System

A
47
Q

Identify where the Anterior White Commissure is in the Spinothalmic Tract

A
48
Q

Identify approximately where the Spinothalmic Tract meets the Medial Lemniscus System

A
49
Q

Identify where the First Order Neurons are in the Spinothalmic Tract

A
50
Q

Identify where the Second Order Neurons are in the Spinothalmic Tract

A
51
Q

Identify where the Third Order Neurons are in the Spinothalmic Tract

A
52
Q

What type of Sensory Loss would occur if a Lesion occured as shown? What Senses are Lost on Which Sides?

A

Dissociative Sensory Loss. Proprioception is lost on the right side of the body, while pain is lost on the left side of the body

53
Q

What type of Sensory Loss would occur if a Lesion occured as shown? What Senses are Lost on Which Sides?

A

Dissociative Sensory Loss. Proprioception is lost on the left side of the body, while pain is lost on the right side of the body

54
Q

What type of Sensory Loss would occur if a Lesion occured as shown? What Senses are Lost on Which Sides?

A

Associative Sensory Loss on the left side of the body. Both proprioception and pain are lost on the left side of the body

55
Q

What type of Sensory Loss would occur if a Lesion occured as shown? What Senses are Lost on Which Sides?

A

Associative Sensory Loss on the right side of the body. Both proprioception and pain are lost on the right side of the body

56
Q

Identify the Pathway of Corticospinal Signals in the spinal cord

A
57
Q

What is the Reflex that occurs in the Spinal Cord when a Lower Motor Neuron recieves input from a Proprioception Neuron?

A

The Myotactic Reflex

58
Q

Identify the Pyramidal Decussation

A
59
Q

Identify the Lower Motor Neurons

A
60
Q

Identify the Upper Motor Neurons

A
61
Q

What type of Paralysis would occur if a Lesion were to occur at this section of the Corticospinal Tract?

A

Spastic Paralysis

62
Q

What type of Paralysis would occur if a Lesion were to occur at this section of the Corticospinal Tract?

A

Flaccid Paralysis

Medsci142 (11 decks)

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