18 Questions
What is the function of parasympathetic preganglionic motor neurons in the spinal cord?
Control involuntary actions like heart rate
Which spinal cord segments house the parasympathetic preganglionic motor neurons in humans?
S2 to S4 segments
Where are the sympathetic preganglionic motor neurons located in the human spinal cord?
T2 to L2 segments
What is the main function of the sympathetic preganglionic motor neurons in the spinal cord?
Maintain fight-or-flight responses
Where are the cell bodies of sensory axons located in relation to the spinal cord?
Dorsal root ganglion
Which part of a spinal nerve contains the axons of motor neurons?
Ventral root
What is the role of the neural crest cells in the development of the nervous system?
Give rise to melanocytes and bones of the face
Which component is NOT part of the peripheral nervous system?
Optic and olfactory nerves
Where do the axons of motor neurons grow until they reach their target muscle?
Schwann cells
Which region contains motor neurons supplying the tail muscles?
Caudal region
What is the primary function of ganglion cells in the autonomic nervous system?
Form postganglionic axons of sympathetic and parasympathetic ganglion cells
Which cells migrate away from the dorsal surface of the neural tube to form the neural crest?
Ganglion cells
Where are autonomic motor neurons primarily located in the spinal cord?
White matter in lamina 9
What type of markers do somatic motor neurons in the spinal cord stain well with?
Acetylcholinesterase and NeuN
Which types of muscles do autonomic motor neurons generally innervate?
Cardiac muscle and glands
In which region of the grey matter are somatic motor neurons found in the spinal cord?
Ventral horn
Which segment of the spinal cord contains autonomic motor neurons responsible for pelvic parasympathetic outflow?
S1 to S4
Which feature differentiates autonomic motor neurons from somatic motor neurons?
Function of innervated muscles
Test your knowledge of mammalian spinal cord motor neurons, specifically focusing on the upper limb motor neurons in lamina 9 of the ventral horn. Learn about the characteristics and functions of these motor neurons.
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