1. Haughton JF, Little JW, Powers RK, Robinson LR, Goldstein B. M/RMS: an EMG method for quantifying upper motoneuron and functional weakness. Muscle Nerve 17; 1994: 936–42.
2. Haughton JF, Little JW. Unpublished findings, 1994.
3. Dommisse GF. The arteries and veins of the spinal cord from birth. Edinburgh; Churchill Livingstone, 1975;18.
4. Kuypers HGJM. Anatomy of the descending pathways. In; Geiger SR et al., eds. The nervous system, Vol II. Baltimore; Williams & Wilkins, 1981;597–666.
5. Kimura J. Electrodiagnosis in diseases of nerve and muscle: principles and practice. Philadelphia; F.A. Davis, 1983;282–4.