41. The flexor pollicis brevis ( FPB ) is typically an ulnar-innervated muscle. 42. LSO innervates the IHC . VNTB innervate OHC . MNTB inhibit LSO via glycine. 43. LSO innervates the IHC . VNTB innervate OHC . MNTB inhibit LSO via glycine. 44. The PRF descends the reticulospinal tract where it innervates motor neurons and spinal interneurons. 45. However, they continue to course with the parasympathetic fibers innervating the lacrimal gland. 46. They are innervated by the dorsal scapular nerve. 47. The postganglionic nerve then proceed to innervate their targets ( pelvic visceral organs ). 48. Low threshold, NPY-negative neurons are secretomotor neurons, innervating salivary glands. 49. High threshold, NPY-negative neurons are pilomotor neurons, innervating blood vessels. 50. An alpha motor neuron and the muscle fibers it innervates is a motor unit.
