Small intestinal bacterial overgrowth (SIBO) refers to a condition in which abnormally large numbers of bacteria are present in the small intestine, while the types of bacteria found in the small intestine are more like the bacteria found in the colon.
motor neuron. noun, Cell Biology, Physiology. 1. a nerve cell that conducts impulses to a muscle, gland, or other effector. Also, motoneuron. motor neuron n. A neuron that conveys impulses from the central nervous system to a muscle, gland, or other effector tissue. Discover our greatest slideshows.
I. Lower and Upper Motor Neurons. Lower motor neurons are neurons that directly innervate skeletal muscle. The cell bodies of these neurons are located within the ventral horns of the spinal cord and within brainstem motor nuclei.ower motor neurons are neurons that directly innervate skeletal muscle. The cell bodies of these neurons are located within the ventral horns of the spinal cord and within brainstem motor nuclei.