Abstract
This study examined whether short-latency intracortical inhibition (SICI) and/or facilitation (ICF) changes with ageing, and if this can be attributed to age-related changes in the inhibition and/or corticospinal stimulus–response curves. SICI/ICF was studied in 17 “old” (63.1 ± 4.2 years) and 13 “young” males (20.0 ± 2.0 years) in both hemispheres using a paired-pulse transcranial magnetic stimulation paradigm at four interstimulus intervals (1, 3, 10 and 12 ms). Motor-evoked potentials were recorded from the first dorsal interosseous muscle at rest, with a conditioning intensity set at 5% stimulator output below the active threshold (aMT). Regardless of age, SICI was greater in the left compared with the right hemisphere. SICI was increased in old men at 3 ms in the left hemisphere and at 1 ms in the in both hemispheres, but ICF was not altered. However, aMT, and hence the conditioning stimulus intensity, was higher in old men. Comparisons of pairs of young and old men with the same aMT, and of SICI curves constructed relative to aMT, failed to show any age-related increase in SICI, although age-related changes in aMT accounted for less than 20% of the variability. Corticospinal stimulus–response characteristics did not influence SICI/ICF and appear not to be altered by ageing in men. When measured in resting muscles, SICI/ICF appears unaltered by age. But it remains unknown if, when assessed during movement preparation or movement, there are changes in SICI related to functional motor changes commonly associated with ageing, such as slowing of movement.
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References
Anderson B, Rutledge V (1996) Age and hemisphere effects on dendritic structure. Brain 119:1983–1990
Bae JS, Sawai S, Misawa S, Kanai K, Isose S, Shibuyam K, Kuwabara S (2008) Effects of age on excitability properties in human motor axons. Clin Neurophysiol 119:2282–2286
Boroojerdi B, Kopylev L, Battaglia F, Facchini S, Ziemann U, Muellbacher W, Cohen LG (2000) Reproducibility of intracortical inhibition and facilitation using the paired-pulse paradigm. Muscle Nerve 23:1594–1597
Butefisch CM, Netz J, Wessling M, Seitz RJ, Homberg V (2003) Remote changes in cortical excitability after stroke. Brain 126:470–481
Butefisch CM, Kleiser R, Seitz RJ (2006) Post-lesional cerebral reorganisation: evidence from functional neuroimaging and transcranial magnetic stimulation. J Physiol Paris 99:437–454
Cabeza R (2002) Hemispheric asymmetry reduction in older adults: the HAROLD Model. Psychol Aging 17:85–100
Chen R (2004) Interactions between inhibitory and excitatory circuits in the human motor cortex. Exp Brain Res 154:1–10
Cicinelli P, Traversa R, Oliveri M, Palmieri MG, Filippi MM, Pasqualetti P, Rossini PM (2000) Intracortical excitatory and inhibitory phenomena to paired transcranial magnetic stimulation in healthy human subjects: differences between the right and left hemisphere. Neurosci Lett 288:171–174
Civardi C, Cavalli A, Naldi P, Varrasi C, Cantello R (2000) Hemispheric asymmetries of cortico-cortical connections in human hand motor areas. Clin Neurophysiol 111:624–629
Di Lazzaro V, Restuccia D, Oliviero A, Profice P, Ferrara L, Insola A, Mazzone P, Tonali P, Rothwell JC (1998) Magnetic transcranial stimulation at intensities below active motor threshold activates intracortical inhibitory circuits. Exp Brain Res 119:265–268
Di Lazzaro V, Rothwell JC, Oliviero A, Profice P, Insola A, Mazzone P, Tonali P (1999) Intracortical origin of the short-latency facilitation produced by pairs of threshold magnetic stimuli applied to human motor cortex. Exp Brain Res 129:494–499
Di Lazzaro V, Oliviero A, Mazzone P, Insola A, Pilato F, Saturno E, Accurso A, Tonali P, Rothwell JC (2001a) Comparison of descending volleys evoked by monophasic and biphasic magnetic stimulation of the motor cortex in conscious humans. Exp Brain Res 141:121–127
Di Lazzaro V, Oliviero A, Saturno E, Pilato F, Insola A, Mazzone P, Profice P, Tonali P, Rothwell JC (2001b) The effect on corticospinal volleys of reversing the direction of current induced in the motor cortex by transcranial magnetic stimulation. Exp Brain Res 138:268–273
Fisher R, Nakamura Y, Bestmann S, Rothwell J, Bostock H (2002) Two phases of intracortical inhibition revealed by transcranial magnetic threshold tracking. Exp Brain Res V143:240–248
Galanopoulou AS (2005) GABAA receptors as broadcasters of sexually differentiating signals in the brain. Epilepsia 46:107–112
Gear RW, Gordon NC, Heller PH, Paul S, Miaskowski C, Levine JD (1996) Gender difference in analgesic response to the kappa-opioid pentazocine. Neurosci Lett 205:207–209
Gunning-Dixon FM, Raz N (2000) The cognitive correlates of white matter abnormalities in normal aging: a quantitative review. Neuropsychology 14:224–232
Hanajima R, Ugawa Y (2000) Intracortical inhibition of the motor cortex in movement disorders. Brain Dev 1:S132–S135
Hanajima R, Ugawa Y, Terao Y, Ogata K, Kanazawa I (1996) Ipsilateral cortico-cortical inhibition of the motor cortex in various neurological disorders. J Neurol Sci 140:109–116
Hanajima R, Ugawa Y, Terao Y, Sakai K, Furubayashi T, Machii K, Kanazawa I (1998) Paired-pulse magnetic stimulation of the human motor cortex: differences among I waves. J Physiol (Lond) 509:607–618
Hanajima R, Furubayashi T, Iwata NK, Shiio Y, Okabe S, Kanazawa I, Ugawa Y (2003) Further evidence to support different mechanisms underlying intracortical inhibition of the motor cortex. Exp Brain Res 151:427–434
Ilic TV, Meintzschel F, Cleff U, Ruge D, Kessler KR, Ziemann U (2002) Short-interval paired-pulse inhibition and facilitation of human motor cortex: the dimension of stimulus intensity. J Physiol (Lond) 545:153–167
Ilic TV, Jung P, Ziemann U (2004) Subtle hemispheric asymmetry of motor cortical inhibitory tone. Clin Neurophysiol 115:330–340
Kolb B, Forgie M, Gibb R, Gorny G, Rowntree S (1998) Age, experience and the changing brain. Neurosci Biobehav Rev 22:143–159
Kossev AR, Schrader C, Dauper J, Dengler R, Rollnik JD (2002) Increased intracortical inhibition in middle-aged humans; a study using paired-pulse transcranial magnetic stimulation. Neurosci Lett 333:83–86
Kujirai T, Caramia MD, Rothwell JC, Day BL, Thompson PD, Ferbert A, Wroe S, Asselman P, Marsden CD (1993) Corticocortical inhibition in human motor cortex. J Physiol 471:501–519
Lauretani F, Russo CR, Bandinelli S, Bartali B, Cavazzini C, Di Iorio A, Corsi AM, Rantanen T, Guralnik JM, Ferrucci L (2003) Age-associated changes in skeletal muscles and their effect on mobility: an operational diagnosis of sarcopenia. J Appl Physiol 185:1–1860
Liepert J, Schwenkreis P, Tegenthoff M, Malin JP (1997) The glutamate antagonist riluzole suppresses intracortical facilitation. J Neural Transm 104:1207–1214
Liepert J, Classen J, Cohen LG, Hallett M (1998) Task-dependent changes of intracortical inhibition. Exp Brain Res 118:421–426
Mackinnon C, Gilley E, Weis-Mc Nultry A, Simuni T (2005) Pathways mediating abnormal intracortical inhibition in Parkinson’s disease. Ann Neurol 58:516–524
Mahncke HW, Bronstone A, Merzenich MM (2006) Brain plasticity and functional losses in the aged: scientific bases for a novel intervention. Prog Brain Res 157:81–109
Manev H, Peričić D (1987) Sex difference in the turnover of GABA in the rat substantia nigra. J Neural Transm 70:321–328
Martin S, Haren M, Taylor A, Middleton S, Wittert G, Members of the Florey Adelaide Male Ageing Study (FAMAS) (2007a) Cohort profile: the Florey Adelaide Male Ageing Study (FAMAS). Int J Epidemiol 36:302–306
Martin SA, Haren MT, Middleton SM, Wittert GA (2007b) The Florey Adelaide Male Ageing Study (FAMAS): design, procedures & participants. BMC Public Health 7
Mattay VS, Fera F, Tessitore A, Hariri AR, Das S, Callicott JH, Weinberger DR (2002) Neurophysiological correlates of age-related changes in human motor function. Neurology 58:630–635
Mattson MP, Maudsley S, Martin B (2004) BDNF and 5-HT: a dynamic duo in age-related neuronal plasticity and neurodegenerative disorders. Trends Neurosci 27:589–594
Nakamura H, Kitagawa H, Kawaguchi Y, Tsuji H (1997) Intracortical facilitation and inhibition after transcranial magnetic stimulation in conscious humans. J Physiol 498:817–823
Oldfield O (1971) The assessment and analysis of handedness: the Edinburgh Inventory. Neuropsychologia 9:97–113
Oliviero A, Profice P, Tonali PA, Pilato F, Saturno E, Dileone M, Ranieri F, Di Lazzaro V (2006) Effects of aging on motor cortex excitability. Neurosci Res 55:74–77
Orth M, Snijders AH, Rothwell JC (2003) The variability of intracortical inhibition and facilitation. Clin Neurophysiol 14:2362–2369
Pantoni LEa (2005) Impact of age-related cerebral white matter changes on the transition to disability—The LARDIS STUDY: rationale, design and methodology. Neuroepidemiology 24:51–62
Peinemann A, Lehner C, Conrad B, Siebner HR (2001) Age-related decrease in paired-pulse intracortical inhibition in the human primary motor cortex. Neurosci Lett 313:33–36
Pitcher JB, Ogston KM, Miles TS (2003) Age and sex differences in human motor cortex input-output characteristics. J Physiol (Lond) 546:605–613
Pugh KG, Lipsitz LA (2002) The microvascular frontal-subcortical syndrome of aging. Neurobiol Aging 23:421–431
Ravizza T, Friedman LK, Moshe SL, Veliskova J (2003) Sex differences in GABAAergic system in rat substantia nigra pars reticulata. Int J Dev Neurosci 21:245–254
Reeves S, Bench C, Howard R (2002) Ageing and the nigrostriatal dopaminergic system. Int J Geriatr Psychiatry 17:359–370
Ridding M, Inzelberg R, Rothwell JC (1995a) Changes in excitability of motor cortical circuitry in patients with Parkinson’s disease. Ann Neurol 37:181–188
Ridding MC, Sheean G, Rothwell JC, Inzelberg R, Kujirai T (1995b) Changes in the balance between motor cortical excitation and inhibition in focal, task-specific dystonia. J Neurol Neurosurg Psychiatry 59:493–498
Ridding MC, Taylor JL, Rothwell JC (1995c) The effect of voluntary contraction on cortico-cortical inhibition in human motor cortex. J Physiol 487:541–548
Riederer P, Hoyer S (2006) From benefit to damage. Glutamate and advanced glycation end products in Alzheimer brain. J Neural Transm V113:1671–1677
Rossini PM, Desiato MT, Caramia MD (1992) Age-related changes of motor-evoked potentials in healthy humans: non-invasive evaluation of central and peripheral motor tracts excitability and conductivity. Brain Res 593:14–19
Sachdev PS, Wen W, Christensen H, Jorm AF (2005) White matter hyperintensities are related to physical disability and poor motor function. J Neurol Neurosurg Psychiatry 76:362–367
Sale M, Semmler J (2005) Age-related differences in corticospinal control during functional isometric contractions in left and right hands. J Physiol 99:1483–1493
Silbert LC, Nelson C, Holman S, Eaton R, Oken BS, Lou JS, Kaye JA (2006) Cortical excitability and age-related volumetric MRI changes. Clin Neurophysiol 117:1029–1036
Smith MJ, Keel JC, Greenberg BD, Adams LF, Schmidt PJ, Rubinow DA, Wassermann EM (1999) Menstrual cycle effects on cortical excitability. Neurology 53:2069–2072
Smith MJ, Adams LF, Schmidt PJ, Rubinow DR, Wassermann EM (2002) Effects of ovarian hormones on human cortical excitability. Ann Neurol 51:599–603
Sommer M, Alfaro A, Rummel M, Speck S, Lang N, Tings T, Paulus W (2006) Half sine, monophasic and biphasic transcranial magnetic stimulation of the human motor cortex. Clin Neurophysiol 117:838–844
Stinear CM, Byblow WD (2004) Impaired modulation of intracortical inhibition in focal hand dystonia. Cereb Cortex 14:555–561
Talelli P, Waddingham W, Ewas A, Rothwell J, Ward N (2008) The effect of age on task-related modulation of interhemispheric balance. Exp Brain Res 186:59–66
Ward NS (2006) Compensatory mechanisms in the aging motor system. Ageing Res Rev 5:239–254
Ward NS, Frackowiak RSJ (2003) Age-related changes in the neural correlates of motor performance. Brain 126:873–888
Ward NS, Frackowiak RSJ (2006) The functional anatomy of cerebral reorganisation after focal brain injury. J Physiol (Paris) 99:425–436
Wassermann EM (2002) Variation in the response to transcranial magnetic brain stimulation in the general population. Clin Neurophysiol 113:1165–1171
Ziemann U, Lonnecker S, Steinhoff BJ, Paulus W (1996a) Effects of antiepileptic drugs on motor cortex excitability in humans: a transcranial magnetic stimulation study [see comments]. Ann Neurol 40:367–378
Ziemann U, Rothwell JC, Ridding MC (1996b) Interaction between intracortical inhibition and facilitation in human motor cortex. J Physiol 496:873–881
Ziemann U, Chen R, Cohen LG, Hallett M (1998) Dextromethorphan decreases the excitability of the human motor cortex. Neurology 51:1320–1324
Acknowledgments
We thank Mr. Sean Martin and the members of the Florey Adelaide Male Ageing Study for their assistance and participation. This work was funded by the National Health and Medical Research Council (NH&MRC) of Australia. AES is a South Australian Department of Health/Faculty of Health Sciences Scholar. JBP is an NH&MRC Peter Doherty Research Fellow. MCR is an NH&MRC Senior Research Fellow.
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Smith, A.E., Ridding, M.C., Higgins, R.D. et al. Age-related changes in short-latency motor cortex inhibition. Exp Brain Res 198, 489–500 (2009). https://doi.org/10.1007/s00221-009-1945-8
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DOI: https://doi.org/10.1007/s00221-009-1945-8