21. Secondary muscle fibers then form around the primary fibers near the time of innervation . 22. Segmental innervation can be mapped through stimulation of the nerve at the spinal segment. 23. The innervation of the testicles is by T9 / T10-L1 / L2. 24. Muscles require innervation to function and even just to maintain muscle tone, avoiding atrophy. 25. In the 1970s, new operative methods were developed to preserve innervation and clitoral function. 26. Nerve fiber innervation is much denser for inner hair cells than for outer hair cells. 27. These exceptions receive general somatic efferent innervation . 28. The branches of the tympanic cavity provide innervation to the mucosa of the middle ear. 29. When appropriate, a nearby donor may be used to supply innervation to lesioned nerves. 30. He also proved the heart had a double innervation through the vagus and sympathetic nerves.
