Abstract
Responses evoked by an electrical stimulus to the median nerve in a small muscle of the human hand during a voluntary contraction have been examined. Two of these responses have been shown to be evoked through reflex pathways. The first, with a mean afferent conduction velocity of 64 m/s and estimated central delay of about 0.8 ms, is identified as an H reflex. The second response, which has an undefined central pathway, has a mean afferent conduction velocity of 43 m/s and an estimated central delay of about 17 ms.
Full text
PDF







Images in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Caccia M. R., McComas A. J., Upton A. R., Blogg T. Cutaneous reflexes in small muscles of the hand. J Neurol Neurosurg Psychiatry. 1973 Dec;36(6):960–977. doi: 10.1136/jnnp.36.6.960. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Cambier J., Dehen H., Bathien N. Upper limb cutaneous polysynaptic reflexes. J Neurol Sci. 1974 May;22(1):39–49. doi: 10.1016/0022-510x(74)90052-5. [DOI] [PubMed] [Google Scholar]
- Diamantopoulos E., Gassel M. M. Electrically induced monosynaptic reflexes in man. J Neurol Neurosurg Psychiatry. 1965 Dec;28(6):496–502. doi: 10.1136/jnnp.28.6.496. [DOI] [PMC free article] [PubMed] [Google Scholar]
- HAGBARTH K. E. Post-tetanic potentiation of myotatic reflexes in man. J Neurol Neurosurg Psychiatry. 1962 Feb;25:1–10. doi: 10.1136/jnnp.25.1.1. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Iles J. F. Responses in human pretibial muscles to sudden stretch and to nerve stimulation. Exp Brain Res. 1977 Dec 19;30(4):451–470. doi: 10.1007/BF00237637. [DOI] [PubMed] [Google Scholar]
- MAGLADERY J. W., McDOUGAL D. B., Jr Electrophysiological studies of nerve and reflex activity in normal man. I. Identification of certain reflexes in the electromyogram and the conduction velocity of peripheral nerve fibers. Bull Johns Hopkins Hosp. 1950 May;86(5):265–290. [PubMed] [Google Scholar]
- MAGLADERY J. W., PORTER W. E., PARK A. M., TEASDALL R. D. Electrophysiological studies of nerve and reflex activity in normal man. IV. The two-neurone reflex and identification of certain action potentials from spinal roots and cord. Bull Johns Hopkins Hosp. 1951 Jun;88(6):499–519. [PubMed] [Google Scholar]
- MAYER R. F. NERVE CONDUCTION STUDIES IN MAN. Neurology. 1963 Dec;13:1021–1030. doi: 10.1212/wnl.13.12.1021. [DOI] [PubMed] [Google Scholar]
- Marsden C. D., Merton P. A., Morton H. B. Changes in loop gain with force in the human muscle servo. J Physiol. 1972 Apr;222(1):32P–34P. [PubMed] [Google Scholar]
- Marsden C. D., Merton P. A., Morton H. B. Is the human stretch reflex cortical rather than spinal? Lancet. 1973 Apr 7;1(7806):759–761. doi: 10.1016/s0140-6736(73)92141-7. [DOI] [PubMed] [Google Scholar]
- Mayer R. F., Feldman R. G. Observations on the nature of the F wave in man. Neurology. 1967 Feb;17(2):147–156. doi: 10.1212/wnl.17.2.147. [DOI] [PubMed] [Google Scholar]
- McLeod J. G., Wray S. H. An experimental study of the F wave in the baboon. J Neurol Neurosurg Psychiatry. 1966 Jun;29(3):196–200. doi: 10.1136/jnnp.29.3.196. [DOI] [PMC free article] [PubMed] [Google Scholar]
- SHIMAMURA M., LIVINGSTON R. B. Longitudinal conduction systems serving spinal and brain-stem coordination. J Neurophysiol. 1963 Mar;26:258–272. doi: 10.1152/jn.1963.26.2.258. [DOI] [PubMed] [Google Scholar]
- TEASDALL R. D., PARK A. M., LANGUTH H. W., MAGLADERY J. W. Electrophysiological studies of reflex activity in patients with lesions of the nervous system. II. Disclosure of normally suppressed monosynaptic reflex discharge of spinal motoneurones by lesions of lower brain-stem and spinal cord. Bull Johns Hopkins Hosp. 1952 Oct;91(4):245–256. [PubMed] [Google Scholar]
- THOMAS J. E., LAMBERT E. H. Ulnar nerve conduction velocity and H-reflex in infants and children. J Appl Physiol. 1960 Jan;15:1–9. doi: 10.1152/jappl.1960.15.1.1. [DOI] [PubMed] [Google Scholar]
- Táboríková H., Sax D. S. Conditioning of H-reflexes by a preceding subthreshold H-reflex stimulus. Brain. 1969 Mar;92(1):203–212. doi: 10.1093/brain/92.1.203. [DOI] [PubMed] [Google Scholar]
- Upton A. R., McComas A. J., Sica R. E. Potentiation of "late" responses evoked in muscles during effort. J Neurol Neurosurg Psychiatry. 1971 Dec;34(6):699–711. doi: 10.1136/jnnp.34.6.699. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Veale J. L., Mark R. F., Rees S. Differential sensitivity of motor and sensory fibres in human ulnar nerve. J Neurol Neurosurg Psychiatry. 1973 Feb;36(1):75–86. doi: 10.1136/jnnp.36.1.75. [DOI] [PMC free article] [PubMed] [Google Scholar]



