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642894
FIBRAS DE PROYECCION
Description
DEBER
Mind Map by
adri-ely-
, updated more than 1 year ago
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Created by
adri-ely-
about 9 years ago
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Resource summary
FIBRAS DE PROYECCION
FUNCION,
UNEN LA CORTEZA CEREBRAL CON EL TRONCO ENCEFALICO Y LA MEDULA ESPINAL
FIBRAS DE PROYECCION CAPSULA INTERNA
Axones aferentes y eferentes que cruzan el espacio entre la masa talàmica y el nùcleo caudado y el nùcleo lenticular por otra
CORONA RADIADA
Conectan corteza , núcleos subcorticales dentro de los hemisferios cerebrales , tronco y médula espinal
UBICACION
Nacen en las capas corticales profundas V Y VI procedentes de cèlulas glutamatèrgicas piramidales tìpicas y piramidales modificadas
En una localizaciòn dorsal se distribuyen en lo que se conoce como CORONA RADIADA
Eta separa el nùcleo caudado y el tàlamo medialmente del nùcleo lenticular lateralmente
A nivel ventral en un tracto compacto denomidçnado CAPSULA INTERNA
Se extienden inferiormente formando los pedùnculos cerebrales en el mesencèfalo
PORCIONES
1.- BRAZO ANTERIOR
-Radiacion talàmica anterior (nùcleos anterior dorsomedial del tàlamo -Fibras fontopònticas la mayorìa
2.- BRAZO POSTERIOR
Radiaciòn talamica superior ( nùcleos ventral posterior y asociativos dorsales del tàlamo - fibras parietopònticas -Vìa piramidal
4.- PORCION RETROLENTICULAR
Radiaciòn talàmica posterior nùcleo pulvinar y en parte las radiaciones òpticas - nùcleo geniculado lateral - Fibras parieto occipito- Pònticas
3.- RODILLA
Radiaciòn talàmica superior (nucleos ventral anterior y ventral lateral del tàlamo - Fibras fronto- pònticas
PORCION SUBLENTICULAR
Radiaciones talàmicas posterior - Fibras temporo- Pònticas
ALTERACION
Hemorragias de Càpsula interna
ictus o accidentes vasculares cerebrales
Frecuentes en personas mayores
Gran concentraciòn de fibras de la vìa piramidal, se da una sintomatologìa motora
HEMIPARESIA O HEMIPLEGIA(paràlisis)
Afecta a los mùsculos de la mitad contralateral del cuerpo, especialmente de las extremidades, asì como mùsculos faciales inferiores
Suele acompañarse de hipertonìa
Si se afectan fibras sensitivas puede aparecer una hemianestesia contralateral
En caso de afectarse las porciones retrolenticular y sublenticular aparecer dèficits visuales
PONTIFICIA UNIVERSIDAD CATÒLICA SEDE AMBATO NEUROPSICOLOGÌA
NOMBRE: ADRIANA MOSQUERA CURSO: 4to "A"
BIBLIOGRAFIA: Jimenez, J & Ballesteros, C (1999). Lecciones de Neuroanatomìa Clìnica. Madrid: EGONDI Artes Gràficas S.A.
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