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gyrus in the right cerebral cortex, then the left side of the body will be affected. Whereas damage below the pyramidal decussation will result in ipsilateral motor deficits. For example, spinal cord damage on the left side of the lateral corticospinal tract at the thoracic level can cause motor deficits to the left side of the body.
227:
Damage to different parts of the body will cause deficits, depending on whether the damage is above (rostral) or below (caudal) the pyramidal decussation. Damage to the body above the pyramidal decussation will cause contralateral motor deficits. For example, if there is a lesion at the pre-central
2650:
215:
Axons in the lateral corticospinal tract weave out of the tract and into the anterior horns of the spinal cord. It controls fine movement of ipsilateral limbs (albeit contralateral to the corresponding motor cortex) as it lies distal to the
187:
and a lower motor neuron. The lateral corticospinal tract is a descending motor pathway that begins in the cerebral cortex, decussates in the pyramids of the lower medulla (also known as the
191:
or the cervicomedullary junction, which is the most posterior division of the brain) and proceeds down the contralateral side of the spinal cord. It is the largest part of the
248:
are all pathologies that could affect the lateral corticospinal tract. Damage to the lower motor neurons could pose a risk of muscle atrophy and other disorders.
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Descending motor pathways carry motor signals from the brain down the spinal cord and to the target muscle or organ. They typically consist of an upper
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Knowledge articles incorporating text from the 20th edition of Gray's
Anatomy (1918)
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Section of the medulla oblongata at the level of the decussation of the pyramids.
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199:, and on transverse section appears as an oval area in front of the
167:, and on transverse section appears as an oval area in front of the
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220:. Control of more central axial and girdle muscles comes from the
992:
68:
1722:
30:
Lateral corticospinal tract labeled in red at upper left.
353:
Anatomy and
Physiology: The Unity of Form and Function
2618:
498:
at the
University of Wisconsin-Madison Medical school
446:Javed, Kinaan; Reddy, Vamsi; Lui, Forshing (2022),
414:Javed, Kinaan; Reddy, Vamsi; Lui, Forshing (2022),
195:. It extends throughout the entire length of the
163:. It extends throughout the entire length of the
2642:
454:, Treasure Island (FL): StatPearls Publishing,
422:, Treasure Island (FL): StatPearls Publishing,
1541:
1008:
517:
496:Illustration and text: sc97/text/P4/intro.htm
445:
413:
448:"Neuroanatomy, Lateral Corticospinal Tract"
416:"Neuroanatomy, Lateral Corticospinal Tract"
355:. New York: McGraw-Hill. pp. 486–488.
1548:
1534:
1015:
1001:
531:
524:
510:
24:
1244:Posterior column-medial lemniscus pathway
776:Descending dorsal longitudinal fasciculus
2435:Flocculonodular lobe/vestibulocerebellum
761:Ascending dorsal longitudinal fasciculus
231:
2394:Intermediate hemisphere/spinocerebellum
350:
2643:
2564:Ventral/anterior spinocerebellar tract
2493:Dorsal/posterior spinocerebellar tract
324:This article incorporates text in the
1529:
996:
505:
375:
402:Neuroanatomy Through Clinical Cases,
251:
76:fasciculus cerebrospinalis lateralis
13:
2361:Lateral hemisphere/pontocerebellum
1884:Posterior limb of internal capsule
1700:Posterior limb of internal capsule
236:Strokes, spinal muscular atrophy,
74:tractus corticospinalis lateralis,
14:
2672:
1655:Posterior external arcuate fibers
475:
380:. Boston: Pearson Education Inc.
2628:
1107:Substantia gelatinosa of Rolando
318:
301:
289:
270:
258:
157:lateral cerebrospinal fasciculus
131:Anatomical terms of neuroanatomy
1022:
205:posterior spinocerebellar tract
173:posterior spinocerebellar tract
781:Medial longitudinal fasciculus
766:Medial longitudinal fasciculus
491:Overview at thebrain.mcgill.ca
439:
407:
394:
369:
344:
281:through the lower part of the
1:
2590:Rostral spinocerebellar tract
639:Dorsal nucleus of vagus nerve
313:
246:amyotrophic lateral sclerosis
159:) is the largest part of the
1201:Central gelatinous substance
906:Inferior cerebellar peduncle
702:Rostral ventromedial medulla
222:anterior corticospinal tract
178:
7:
2536:Anterior lobe of cerebellum
644:Inferior salivatory nucleus
332:of the 20th edition of
283:decussation of the pyramids
210:
149:lateral corticospinal tract
19:Lateral corticospinal tract
10:
2677:
2488:Posterior thoracic nucleus
2202:Thalamocortical radiations
2126:Thalamocortical radiations
1145:Posterior thoracic nucleus
697:Arcuate nucleus of medulla
2545:
2522:Accessory cuneate nucleus
2464:
2453:
2440:Vestibulocerebellar tract
2349:
2274:Vestibulocerebellar tract
2261:
2252:
2217:
2141:
2081:
2072:
2048:
2018:
1988:
1962:
1924:
1915:
1867:
1860:
1809:
1783:Posterior parietal cortex
1750:Anterior white commissure
1730:
1716:
1688:
1636:
1591:
1582:
1575:
1482:
1470:Anterior white commissure
1462:
1405:
1353:
1346:
1319:
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1234:
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1218:
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1140:Intermediolateral nucleus
1130:
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1030:
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828:
821:
791:
735:
726:
692:Ventral respiratory group
682:
674:Accessory cuneate nucleus
656:
617:
558:
549:
540:
351:Saladin, Kenneth (2012).
129:
117:
105:
93:
81:
67:
62:
50:
40:
35:
23:
18:
2319:Inferior olivary nucleus
2206:Supplementary motor area
2130:Supplementary motor area
1940:Genu of internal capsule
1792:Spinomesencephalic tract
858:Inferior olivary nucleus
580:Dorsal respiratory group
265:Decussation of pyramids.
2407:Cerebellothalamic tract
1888:Decussation of pyramids
1659:Internal arcuate fibers
1508:Posterior median sulcus
1493:Anterior median fissure
876:Posterior median sulcus
841:Anterior median fissure
153:crossed pyramidal tract
2341:Deep cerebellar nuclei
2308:Deep cerebellar nuclei
2299:Pontocerebellar fibers
2174:Subthalamic fasciculus
2166:Subthalamic fasciculus
1907:Neuromuscular junction
982:Perihypoglossal nuclei
238:Brown Sequard Syndrome
57:Central nervous system
2527:Cuneocerebellar tract
2370:Dentatothalamic tract
2324:Olivocerebellar tract
2221:nigrostriatal pathway
2182:Lenticular fasciculus
2106:Lenticular fasciculus
2009:Vestibulospinal tract
1513:Posterolateral sulcus
1094:Posterior grey column
881:Posterolateral sulcus
802:Olivocerebellar tract
712:Pre-Bötzinger complex
232:Clinical significance
218:pyramidal decussation
2039:Reticulospinal tract
1950:Facial motor nucleus
1936:Primary motor cortex
1880:Primary motor cortex
1826:Spinoreticular tract
1667:Trigeminal lemniscus
1606:Meissner's corpuscle
1498:Anterolateral sulcus
1329:Spinoreticular tract
1155:Anterior grey column
1038:Cervical enlargement
846:Anterolateral sulcus
376:Pinel, John (2011).
2402:Reticular formation
2190:Thalamic fasciculus
2170:Subthalamic nucleus
2114:Thalamic fasciculus
2034:Reticular formation
2030:Vestibulocerebellum
2000:Vestibulocerebellum
1945:Corticobulbar tract
1893:Corticospinal tract
1831:Reticular formation
1821:Group C nerve fiber
1797:Superior colliculus
1762:Spinothalamic tract
1649:sensory decussation
1334:Spino-olivary tract
1132:Lateral grey column
928:Reticular formation
896:Hypoglossal trigone
807:Rubro-olivary tract
756:Juxtarestiform body
746:Sensory decussation
629:Hypoglossal nucleus
193:corticospinal tract
161:corticospinal tract
2661:Spinal cord tracts
2585:Golgi tendon organ
2559:Golgi tendon organ
2390:Interposed nucleus
1620:Cuneate fasciculus
1616:Gracile fasciculus
1602:Pacinian corpuscle
1180:Gamma motor neuron
1168:Alpha motor neuron
1073:Terminal ventricle
1043:Lumbar enlargement
798:Descending tracts
203:and medial to the
171:and medial to the
2616:
2615:
2612:
2611:
2608:
2607:
2573:Cerebellar vermis
2502:Cerebellar vermis
2445:Vestibular nuclei
2431:Fastigial nucleus
2269:Vestibular nuclei
2248:
2247:
2244:
2243:
2186:Ansa lenticularis
2110:Ansa lenticularis
2068:
2067:
2061:→ muscles of neck
2058:Tectospinal tract
2004:Vestibular nuclei
1979:Rubrospinal tract
1856:
1855:
1852:
1851:
1779:Postcentral gyrus
1742:Free nerve ending
1712:
1711:
1704:Postcentral gyrus
1523:
1522:
1483:External features
1478:
1477:
1458:
1457:
1395:Hypothalamospinal
1342:
1341:
1214:
1213:
990:
989:
914:
913:
817:
816:
722:
721:
707:Botzinger complex
652:
651:
592:Vestibular nuclei
587:Gustatory nucleus
387:978-0-205-83256-9
362:978-0-07-337825-1
279:medulla oblongata
252:Additional images
189:medulla oblongata
151:(also called the
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1993:
1967:
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1843:Cingulate cortex
1767:Spinal lemniscus
1728:
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1663:Medial lemniscus
1611:Posterior column
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1112:Nucleus proprius
1102:Marginal nucleus
1090:
1089:
1048:Conus medullaris
1031:General features
1017:
1010:
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994:
993:
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825:
751:Medial lemniscus
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634:Nucleus ambiguus
622:
570:Solitary nucleus
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308:The motor tract.
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201:posterior column
197:medulla spinalis
169:posterior column
137:edit on Wikidata
134:
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2480:muscle spindles
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2457:Spinocerebellar
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2357:Dentate nucleus
2345:
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2053:Midbrain tectum
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1801:Midbrain tectum
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1651:/arcuate fibers
1632:
1628:Cuneate nucleus
1624:Gracile nucleus
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1524:
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1474:
1454:
1428:Vestibulospinal
1424:Extrapyramidal
1401:
1338:
1315:
1272:Spinocerebellar
1258:
1210:
1206:Gray commissure
1184:
1149:
1126:
1122:Rexed lamina VI
1079:
1053:Filum terminale
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1021:
991:
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933:Gigantocellular
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901:Medial eminence
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813:
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669:Cuneate nucleus
664:Gracile nucleus
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532:Anatomy of the
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2454:Bidirectional:
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1954:Facial muscles
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1917:Extrapyramidal
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1433:Reticulospinal
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1414:Corticospinal
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1390:Reticulospinal
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1375:Extrapyramidal
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1306:Posterolateral
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1173:Onuf's nucleus
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1117:Rexed lamina V
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551:Cranial nuclei
544:
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476:External links
474:
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335:Gray's Anatomy
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2017:
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1746:A delta fiber
1743:
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1718:Anterolateral
1715:
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938:Parvocellular
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378:Biopsychology
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364:
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326:public domain
304:
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242:poliomyelitis
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27:
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17:
2656:Motor system
2588:
2562:
2525:
2491:
2438:
2424:Motor cortex
2405:
2383:Motor cortex
2368:
2322:
2312:Granule cell
2297:
2287:Granule cell
2272:
2219:
2210:Motor cortex
2154:Motor cortex
2144:
2134:Motor cortex
2094:Motor cortex
2084:
2056:
2037:
2020:
2007:
1990:
1977:
1964:
1943:
1926:
1896:
1891:
1876:
1824:
1790:
1788:
1753:
1647:
1609:
1367:
1220:White matter
1085:Grey columns
1058:Cauda equina
960:Raphe nuclei
728:White matter
619:
560:
463:, retrieved
451:
441:
431:, retrieved
419:
409:
401:
400:Blumenfeld,
396:
377:
371:
352:
346:
337:
323:
317:
235:
226:
214:
185:motor neuron
182:
156:
152:
148:
146:
100:A14.1.02.219
73:
2466:Unconscious
2412:Red nucleus
1974:Red nucleus
1561:spinal cord
1448:Olivospinal
1443:Raphespinal
1438:Tectospinal
1385:Raphespinal
1380:Rubrospinal
1311:Spinotectal
1163:Interneuron
1024:Spinal cord
542:Grey matter
165:spinal cord
63:Identifiers
45:Spinal cord
2645:Categories
2599:Cerebellum
2581:upper limb
2555:lower limb
2547:Reflex arc
2510:upper limb
2476:lower limb
2333:Hemisphere
2283:Cerebellum
2254:Cerebellar
2132:) → 5° (
2021:extension:
1991:extension:
953:Paramedian
486:NeuroNames
465:2022-05-17
452:StatPearls
433:2022-05-17
420:StatPearls
314:References
83:NeuroNames
2208:) → 7° (
2145:indirect:
1869:Pyramidal
1569:fasciculi
1236:Posterior
620:efferent:
561:afferent:
179:Structure
2587:) → 2° (
2561:) → 2° (
2520:) → 2° (
2486:) → 2° (
2416:Thalamus
2375:Thalamus
2350:Efferent
2262:Afferent
2236:Striatum
2200:) → 6° (
2198:Thalamus
2180:) → 5° (
2172:) → 4° (
2164:) → 3° (
2160:) → 2° (
2158:Striatum
2124:) → 4° (
2122:Thalamus
2104:) → 3° (
2100:) → 2° (
2098:Striatum
1965:flexion:
1927:flexion:
1901:Anterior
1877:flexion:
1841:) → 3° (
1839:Thalamus
1833:) → 2° (
1781:) → 4° (
1777:) → 3° (
1775:Thalamus
1759:Anterior
1748:) → 2° (
1734:/lateral
1671:Thalamus
1489:Ventral
1418:Anterior
1407:Anterior
1321:Anterior
1299:anterior
1063:Meninges
975:Pallidus
965:Obscurus
742:Sensory
607:Inferior
482:hier-798
460:30521239
428:30521239
330:page 759
211:Function
2635:Anatomy
2404:, or →
2085:direct:
1897:Lateral
1813:/medial
1755:Lateral
1576:Sensory
1504:Dorsal
1368:Lateral
1355:Lateral
1294:lateral
1282:ventral
1264:Lateral
1254:Cuneate
1249:Gracile
1228:Sensory
948:Lateral
943:Ventral
836:Pyramid
822:Surface
792:Ventral
683:Ventral
597:Lateral
534:medulla
41:Part of
36:Details
2621:Portal
2583:→ 1° (
2557:→ 1° (
2512:→ 1° (
2478:→ 1° (
1277:dorsal
970:Magnus
772:Motor
736:Dorsal
657:Dorsal
602:Medial
458:
426:
384:
359:
338:(1918)
52:System
1861:Motor
1557:Brain
1347:Motor
1189:Other
853:Olive
829:Front
575:tract
328:from
135:[
124:72635
69:Latin
2422:) →
2381:) →
2152:1° (
2092:1° (
1819:1° (
1811:Slow
1789:2° (
1757:and
1740:1° (
1732:Fast
1723:pain
1661:) →
1622:) →
1584:DCML
1567:and
1559:and
1463:Both
920:Grey
869:Back
456:PMID
424:PMID
404:2002
382:ISBN
357:ISBN
244:and
147:The
112:6095
95:TA98
88:2954
2595:ICP
2569:SCP
2532:ICP
2518:DRG
2498:ICP
2484:DRG
2433:in
2398:SCP
2392:in
2365:SCP
2359:in
2329:ICP
2321:→
2304:MCP
2279:ICP
2196:of
2178:GPi
2162:GPe
2120:of
2102:GPi
2002:→
1837:of
1799:of
1773:of
1771:VPL
1679:VPM
1675:VPL
484:at
155:or
119:FMA
107:TA2
2647::
2597:→
2593:→
2571:→
2567:→
2534:→
2530:→
2524:→
2516:→
2500:→
2496:→
2490:→
2482:→
2443:→
2437:→
2420:VL
2414:→
2410:→
2400:→
2396:→
2379:VL
2373:→
2367:→
2363:→
2339:→
2335:→
2331:→
2327:→
2310:→
2306:→
2302:→
2296:→
2285:→
2281:→
2277:→
2271:→
2234:→
2204:→
2194:VL
2192:→
2188:→
2176:→
2168:→
2156:→
2128:→
2118:VL
2116:→
2112:→
2096:→
2055:→
2036:→
2032:→
2006:→
1976:→
1952:→
1948:→
1942:→
1938:→
1905:→
1899:,
1890:→
1886:→
1882:→
1835:MD
1829:→
1823:→
1803:)
1795:→
1769:→
1765:→
1752:→
1744:→
1702:→
1698:→
1690:3°
1677:,
1669:→
1657:,
1646:→
1638:2°
1608:→
1593:1°
1563::
450:,
418:,
240:,
224:.
207:.
175:.
2623::
2601:)
2575:)
2538:)
2504:)
2418:(
2377:(
2223::
2212:)
2184:/
2136:)
2108:/
1903:)
1895:(
1845:)
1785:)
1720:/
1692::
1681:)
1673:(
1665:/
1653:(
1640::
1626:/
1618:/
1614:(
1604:/
1595::
1549:e
1542:t
1535:v
1016:e
1009:t
1002:v
525:e
518:t
511:v
390:.
365:.
139:]
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