Medicine College

In regards to the spinothalamic tract, where does the second order neuron cross the midline?
a. at that spinal cord segment
b. in the brainstem
c. at the thalamus
d. never crosses midline

Answers

Answer 1

Answer:

The correct answer will be option A.

Explanation:

In spinothalamic tract is a projection with axons which terminates in the thalamic nuclei.  This tract comprises of three neuron pathways: primary order neurons, secondary order neurons and tertiary order neurons.

The axons of the secondary order neurons receive the impulse to form the primary order neuron in the dorsal neuron and then crosses the midline at the anterior spinal cord in ventral white commissure to reach the opposite sides. after this neuron passes through the brainstem to the thalamus.

Thus, option A- at that spinal cord segment is the correct answer.

Related Questions

A male patient presents with the following respiratory volumes and capacities: TV = 500 mL, ERV-600 mL, IRV 2,700 mL.
What is this patient's VC? Are these values normal? If not, are they more consistent with an obstructive or restrictive disease pattern? Explain.

Answers

Answer:

The patient VC is 3800ml.

Explanation:

Vital capacity may be defined as the maximum amount of air that a person can expel after maximum inspiration. Tidal volume is the sum of  expiratory reserve volume, inspiratory reserve volume and tidal volume.

Vital capacity (VC) of a patient is 3800 (500+600+2700). The patients has restrictive disease pattern because its expiratory reserve volume has been decreased. The patients suffers from the lung restriction and respiratory failure.

Thus, the patient VC is 3800 ml and has restrictive disease pattern.

Final answer:

The patient's Vital Capacity, calculated as the sum of Tidal Volume, Expiratory Reserve Volume, and Inspiratory Reserve Volume, is 3,800 mL, lower than the average for males, and may suggest a restrictive lung disease.

Explanation:

The patient's Vital Capacity (VC) can be calculated by adding the Tidal Volume (TV), the Expiratory Reserve Volume (ERV), and the Inspiratory Reserve Volume (IRV) together. In this case, the VC will be the sum of 500 mL (TV) + 600 mL (ERV) + 2,700 mL (IRV), which equals 3,800 mL.

The average male VC is approximately 4,800 mL, so this patient's VC is somewhat lower than usual. These values might suggest a restrictive disease pattern, characteristic of conditions such as pulmonary fibrosis or muscular dystrophy, in which lung expansion is limited and the total lung volume is reduced.

Learn more about Pulmonary Volumes and Capacities here:

https://brainly.com/question/31142085

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