Which of the following statements best describes the axonal projection patterns of upper motoneurons located in the primary motor cortex? Upper motoneurons located in the primary motor cortex are cholinergic and their axons project directly to muscle fibres to control voluntary muscle movements. Upper motoneurons located in the primary motor cortex are glutamatergic and their axons project to the thalamus, brain stem and directly to muscle fibres to control voluntary muscle movements. Upper motoneurons located in the primary motor cortex project to the spinal cord where they synapse with cholinergic lower motoneurons that control voluntary muscle movements. Upper motoneurons located in the primary motor cortex project to neurons in the cerebellum, thalamus and brain stem that in turn contact lower motoneurons in the spinal cord to control voluntary muscle movements.

The primary motor cortex plays a critical role in initiating and controlling voluntary muscle…

Answered: Which of the following statements best…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Which of the following statements best describes the axonal projection patterns of upper motoneurons located in the primary motor cortex?

		Upper motoneurons located in the primary motor cortex are cholinergic and their axons project directly to muscle fibres to control voluntary muscle movements.
		Upper motoneurons located in the primary motor cortex are glutamatergic and their axons project to the thalamus, brain stem and directly to muscle fibres to control voluntary muscle movements.
		Upper motoneurons located in the primary motor cortex project to the spinal cord where they synapse with cholinergic lower motoneurons that control voluntary muscle movements.
		Upper motoneurons located in the primary motor cortex project to neurons in the cerebellum, thalamus and brain stem that in turn contact lower motoneurons in the spinal cord to control voluntary muscle movements.

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