18 Questions
Where does the primary motor cortex and neighboring regions originate?
Corona Radiata
What forms the Anterior and Lateral Corticospinal tracts?
Pyramidal Decussation
Which structure crosses in the Pyramidal Decussation?
Pyramids
What is the role of muscle tone in the body?
Nourish muscles and maintain body posture
Where do the anterior (ventral) horn cell and the peripheral nerve belong anatomically?
Neuromuscular junction
What is the specific function of the Pyramids in the brain stem?
Control muscle tone
Which type of sensations are conducted to the CNS via somatic nerves?
Somatic sensations
Which cranial nerve is responsible for muscle tone in the face?
Trigeminal nerve
Which brain stem nuclei are involved in the regulation of muscle tone?
Red nucleus
The corticospinal tracts originate from which area of the brain?
Cerebral cortex
Which spinal cord level is involved in the pathway of pain and temperature sensations?
Cervical
What is the lateral branch of the posterior root ganglion's axon involved in?
Forming the afferent sensory nerve
Which of the following best describes the pathway for fine touch sensations?
It follows the same pathway as deep (proprioceptive) sensations.
Which spinal cord tract carries fibres from the lower half of the body and lies medially?
Gracile Tract
Which of the following statements is true about the 3rd order neurone in the pathway of sensations?
It ascends through the posterior limb of the internal capsule.
Which of the following best describes the pathway for deep (proprioceptive) sensations?
It follows the same pathway as fine touch.
Which nuclei in the medulla are involved in the relay of deep (proprioceptive) sensations?
Gracile and Cuneate nuclei
Which of the following best describes the pathway for simple touch sensations?
It ascends in the Ventral Spinothalamic tract of the opposite side of the spinal cord.
Test your knowledge on the different levels of the spinal cord, nuclei in the brainstem, and the pathway of the Motor Cranial Nerve. Topics include Originating in the Primary Motor Cortex, crossing in the Pyramidal Decussation, and forming Anterior and Lateral Corticospinal tracts.
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