An Individual Was Brought into the Emergency Department After a Motor

question 7

Multiple Choice

An individual was brought into the emergency department after a motor vehicle collision. This patient is conscious and reports no loss of consciousness during the incident. There is no physical evidence of any head trauma. However, upon examination, the following sensory deficits are noted: loss of fine touch and vibration sense in both the left arm and leg, including the hand and foot, and loss of pain and temperature sense in the right arm and leg, including the hand and foot.
-The loss of fine touch and vibration sense involves which of the following nerve tracts in this patient?

• A)Anterolateral system
• B)Dorsal column system
• C)Corticospinal tract
• D)Medial forebrain bundle

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Definitions:

Genotype

The genetic makeup of an organism, consisting of all the DNA and genes present within its genome.

Dosage Compensation

Genetic mechanism by which the expression of X-linked genes is made equivalent in XX females and XY males; in mammals this is accomplished by rendering all but one X chromosome inactive.

X Chromosome Inactivation

A process by which one of the copies of the X chromosome present in female mammals is inactivated, ensuring that males and females have the same dose of the X chromosome genes.

X Chromosome Inactivation Center (XIC)

A critical region on the X chromosome that controls the process of X chromosome inactivation during female development.