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Most parasympathetic motor pathways begin in the dorsal aspect of the medulla, in the dorsal motor nucleus of the vagus nerve. Parasympathetic motor pathways also come from the preganglionic cell bodies located in the lateral horn of the spinal cord in the sacral region (pelvic splanchnic nerves). Thus, the description cranio-sacral is often used to describe the origins of the parasympathetic innervation.
What else can I help you with?
Does the oculomotor nerve have motor fibers?
Yes it is motor and parasympathetic.
How many motor neurons are involved in the descending motor pathways?
two motor neurons are always involved in descending motor pathways. the upper motor neuron and the lower motor neuron.
What is a parasympathetic motor pathway?
Most of the parasympathetic motor pathway goes through oculomotor, facial, glassopharyngeal and vagus nerve. They are third, seventh, ninth and tenth cranial nerves. There is sacral out flow also.
What Consists of all outgoing motor pathways?
The corticospinal tract, extrapyramidal system, and rubrospinal tract together form the major outgoing motor pathways from the brain to the body. These pathways control voluntary movement and posture by transmitting motor signals from the brain to the spinal cord and ultimately to the muscles.
Do both parasympathetic and sympathetic nervous systems operate with a chain of two motor neurons?
True
Is acetylcholine the substance released by the axon terminals of both somatic motor neurons and postganglionic parasympathetic neurons?
Yes, acetylcholine is the substance released by the axon terminals of both somatic motor neurons and postganglionic parasympathetic neurons. In the somatic nervous system, acetylcholine is released at the neuromuscular junction, while in the parasympathetic nervous system, it is released at synapses with target organs.
What is the difference between the vagus nerve and the parasympathetic nerve relating to the respiratory system?
Vagus nerve has a lot of branches. Some of them form a motor supply to the muscle (thru recurrent laryngeal nerve) whereas some form a parasympathetic chain that supply the respiratory system and other system too (ie: Cardiovascular parasympathetic also supplied by the brach of vagus) The branches of the vagus that differ the motor function and the parasympathetic fuction related to the respiratory system.
Which cranial nerves carries nearly 75 percent of all parasympathetic division motor outflow?
vagus
What are descending pathways of the CNS composed of?
Descending pathways of the central nervous system are primarily composed of motor neurons that carry signals from the brain to the spinal cord and peripheral nerves. These pathways are responsible for executing voluntary movements, regulating reflexes, and coordinating motor functions throughout the body.
What is principle of final common path as it pertains to somatic motor pathways?
The principle of final common path states that all somatic motor pathways converge on the alpha motor neurons in the spinal cord. These alpha motor neurons innervate skeletal muscles to produce movement. This convergence allows for integration of input from multiple sources before initiating a motor response.
What would be the cause of a change in afferent and efferent?
A change in afferent pathways could be due to damage or dysfunction in sensory receptors, nerves, or pathways. A change in efferent pathways could be caused by issues in motor neurons or the neuromuscular junction. Both types of changes can result in altered sensory perception or impaired motor function.
What is motor program?
The set of coordinated commands that control the programmed muscle activity mediated by extapyramidal pathways is often called a motor program.
