| 单词 | ventral horn |
| 例句 | A collateral branch of the sensory axon would inhibit another ventral horn motor neuron so that the triceps brachii do not contract and slow the withdrawal down. Anatomy and Physiology 2013-06-19T00:00:00Z Motor cell of ventral horn of spinal cord from the human fetus 133 23. Psychotherapy 2011-06-19T02:00:20.053Z Upon reaching the appropriate level, the axons decussate, entering the ventral horn on the opposite side of the spinal cord from which they entered. Anatomy and Physiology 2013-06-19T00:00:00Z In the ventral horn, these axons synapse with their corresponding lower motor neurons. Anatomy and Physiology 2013-06-19T00:00:00Z Some collateral branches of the tract will project into the ipsilateral ventral horn to control synergistic muscles on that side of the body, or to inhibit antagonistic muscles through interneurons within the ventral horn. Anatomy and Physiology 2013-06-19T00:00:00Z The lower motor neurons are located in the medial regions of the ventral horn, because they control the axial muscles of the trunk. Anatomy and Physiology 2013-06-19T00:00:00Z The corticospinal fibers that project to the ventral horn of the spinal cord have branches that also synapse in the pons, which project to the cerebellum. Anatomy and Physiology 2013-06-19T00:00:00Z All of these motor pathways project to the spinal cord to synapse with motor neurons in the ventral horn of the spinal cord. Anatomy and Physiology 2013-06-19T00:00:00Z A simple case is a reflex caused by a synapse between a dorsal sensory neuron axon and a motor neuron in the ventral horn. Anatomy and Physiology 2013-06-19T00:00:00Z These fibers synapse on motor neurons in the ventral horn. Anatomy and Physiology 2013-06-19T00:00:00Z The motor system can indicate the loss of input to the ventral horn in the lumbar enlargement where motor neurons to the leg are found, but motor function in the trunk is less clear. Anatomy and Physiology 2013-06-19T00:00:00Z The ventral horn motor neurons then project to skeletal muscle and cause contraction. Anatomy and Physiology 2013-06-19T00:00:00Z The fiber synapses directly on the ventral horn motor neuron that activates the muscle, causing contraction. Anatomy and Physiology 2013-06-19T00:00:00Z This triggers an action potential, which travels along the sensory fiber from the skin, through the dorsal spinal root to the spinal cord, and directly activates a ventral horn motor neuron. Anatomy and Physiology 2013-06-19T00:00:00Z The lower motor neurons, which are responsible for the contraction of these muscles, are found in the ventral horn of the spinal cord. Anatomy and Physiology 2013-06-19T00:00:00Z The ventral horn in both the lower cervical spinal cord and the lumbar spinal cord both have wider ventral horns, representing the greater number of muscles controlled by these motor neurons. Anatomy and Physiology 2013-06-19T00:00:00Z These large, multipolar neurons have a corona of dendrites surrounding the cell body and an axon that extends out of the ventral horn. Anatomy and Physiology 2013-06-19T00:00:00Z The output of a somatic reflex is the lower motor neuron in the ventral horn of the spinal cord that projects directly to a skeletal muscle to cause its contraction. Anatomy and Physiology 2013-06-19T00:00:00Z Somatic reflexes, for instance, involve a direct connection from the ventral horn of the spinal cord to the skeletal muscle. Anatomy and Physiology 2013-06-19T00:00:00Z In the white matter, the dorsal column relays sensory information to the brain, and the anterior column is almost exclusively relaying motor commands to the ventral horn motor neurons. Anatomy and Physiology 2013-06-19T00:00:00Z |
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