Pathophysiology Exam #3

Question 1

Answer 1

TOTAL BLINDNESS IN ONE EYE

NOTE: Lesion anterior to optic chiasm that involves

both R lateral and medial fibers leading to loss of

R lateral and medial visual fields

(complete blindness in R eye)

Question 2

Answer 2

HEMISPHERE LOSS IN ONE EYE

NOTE: Location of lesion is anterior to optic chiasm that involves only lateral fibers leading to loss of R medial visual fields

ß ß ß ß ß ß ß ß ß ß ß ß ß ß ß ß

• Anterior to the optic chiasm
• Only interruption to the lateral fibers
• Leading to loss of medial visual fields

Question 3

Answer 3

HEMISPHERE LOSS IN ONE EYE

NOTE: Location of lesion is ANTERIOR to the optic chiasm that involves only L medial fibers leading to loss of L lateral visual field

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Question 4

Answer 4

HEMISPHERE LOSS IN ONE EYE

NOTE: Location of lesion is POSTERIOR to optic chiasm that involves only R lateral fibers leading to loss of R medial visual fields

• Notice that the interruption is POSTERIOR to the optic chiasm in the optic radiations

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Question 5

Answer 5

HEMISPHERE LOSS IN ONE EYE

NOTE: Location of lesion is POSTERIOR to optic chiasm that involves only medial fibers leading to loss of R lateral visual fields

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Question 6

Answer 6

(L – SIDED) HOMONYMOUS HEMIANOPSIA

NOTE: Location of lesion on the R side POSTERIOR to the optic chiasm that involves both lateral and medial fibers leading to L lateral and R medial visual field losses

• Called “LEFT – SIDED” because of that is where

the visual loss is,• NOT, where the injury is

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Question 7

Answer 7

BITEMPORAL HEMIANOPSIA

NOTE: Lesion at optic chiasm that involves medial fibers from both eyes leading to R and L lateral visual field losses

à à à à à à à à à à à à

• Likely caused by enlargement of the pituitary
• If it continues to grow, it will also affect the lateral fibers.

Question 8

Posterior what is the first structure encountered?

Answer 8

Skin-Posterior surface of the body

Question 9

After the skin what is the next structure?

Answer 9

Subcutaneous Tissue

Question 10

After Subcutaneous Tissue what is the next structure?

Answer 10

Supraspinal Ligament

Question 11

After Supraspinal Ligament what is the next structure?

Answer 11

Interspinal Ligament

Question 12

After Interspinal Ligament what is the next structure?

Answer 12

Gap between Left and Right Ligamenta Flava

Question 13

After the gap between the left and right Ligamenta Flava what is the next structure?

Answer 13

Epidural Space

Question 14

After Epidural Space what is the next structure?

Answer 14

Dura Mater

Question 15

After the Dura Mater what is the next structure?

Answer 15

Subdural Space

Question 16

After the Subdural Space what is the next structure?

Answer 16

Arachnoid Mater

Question 17

After the Arachnoid Mater what is the next structure?​

Answer 17

Subarachnoid Space/CSF

Question 18

After the Subarachnoid Space/CSF what is the next structure?​

Answer 18

Posterior(Dorsal) Median Sulcus

Question 19

After the Posterior(Dorsal) Median Sulcus what is the next structure?​

Answer 19

Pia Mater

Question 20

After the Pia Mater what is the next structure?​

Answer 20

Posterior(Dorsal) Column White Matter

Question 21

After the Posterior(Dorsal) Column White Matter what is the next structure?​

Answer 21

Posterior Gray Commissure

Question 22

After the Posterior Gray Commissure what is the next structure?​

Answer 22

Central Canal of the Spinal Cord

Question 23

After the Central Canal of the Spinal Cord what structure is next?

Answer 23

Anterior Gray Commissure

Question 24

After the Anterior Gray Commissure what is the next structure?​

Answer 24

Anterior White Commissure

Question 25

After the Anterior White Commissure what is the next structure?​

Answer 25

Pia Mater

Question 26

After the Pia Mater what is the next structure?​

Answer 26

Anterior(Ventral) Median Fissure

Question 27

After the Anterior Median Fissure what is the next structure?​

Answer 27

Anterior Spinal Artery

Question 28

After the Anterior Spinal Arter what is the next structure?​

Answer 28

Subarachnoid Space

Question 29

After the Subarachnoid Space what is the next structure?​

Answer 29

Arachnoid Mater

Question 30

After the Arachnoid Mater what is the next structure?​

Answer 30

Subdural Space

Question 31

After the Subdural Space what is the next structure?​

Answer 31

Dura Mater

Question 32

After the Dura Mater what is the next structure?​

Answer 32

Epidural Space

Question 33

After the Epidural Space what is the next structure?​

Answer 33

Posterior Longitudinal Ligament

Question 34

After the Posterior Longitudinal Ligament what is the next structure?​

Answer 34

Anulus Fibrosus

Question 35

After the Anulus Fibrosus what is the next structure?​

Answer 35

Nucleus Pulposus

Question 36

After the Nucleus Pulposus what is the next structure?​

Answer 36

Anulus Fibrosus

Question 37

After the Anulus Fibrosus what is the next structure which is the most anterior?​

Answer 37

Anterior Longitudinal Ligament

Question 38

What nerve innervates?

Answer 38

Axillary Nerve

Question 39

What nerve innervates?

Answer 39

Radial Nerve

Question 40

What nerve innervates?

Answer 40

Musculocutaneous Nerve

Question 41

What nerve innervates?

Answer 41

Ulnar Nerve

Question 42

What nerve innervates?

Answer 42

Median Nerve