BENH LY
1. Phan ling Erb
Binh thiidng khi kich thich bang dong galvanic cd co chdp nhoang va co dac diem la cd co (C) khi dong (D) dien d am ctfc (A) manh hdn khi dong ctfc dUdng (D) (CDA) > (CDD). Hien ttfdng dao Ion cong thtfc CDD > CDA la phan ling Erb dtfOng tfnh. Phan ilng nay xuat hien vai tuan sau thiiOng ton than kinh.
Phan ting Erb dtfdng tmh thtfdng di kem theo phan ting co cO cham (phan ting Remark dtfdng tmh) phan anh tinh trang thtfdng ton tram trong cua day than kinh va te bao than kinh
2. Phan ting chieu doc
Binh thtfdng kich thich c0 vdi dong galvanic tai diem van dong thi nhay hon d hai dau cO. Nhtfng sau khoang hai thang thtfOng ton day than kinh thi dap ting dan dan ngtfpc lai, den khi dap tfng d dau cd lai nhay hdn d diem van dong thi tao nen trang thai phan tfng chieu doc.
3. Phan ting thoai hoa dien
a. Thdi gian xuat hien phan ting thoai hod dien
Co phan tfng thoai hoa dien sau khi thtfOng ton day than kinh (DTK) hoac te bao sting trtfdc tuy 1 2 - 1 5 ngay (bang 2.2).
BANG 2.2: PHAN tTNG THOAI HOA (PUTH) DIEN
Dongfaradic - DTK Dong ganvanic -DTK Dong faradic - cd Dong galvanic - cd Binh thudng Co cd Co cd Co cd Co cd chdp nhoang CDA > COD PUTH 1 phan
Co cd yeu Co cd yeu Co cd yeu Co cd Id dd COD >COA PUTH
hoan toan
Khong Khong Khong Co cd Id dd
COD > CDA Mat hoan
toan tinh chiu kich thich dien
b. Tien trien cua phan ting thoai hod dien
- Thdi ky dau (vai ngay sau thiidng ton te bao than kinh ngoai vi): ngtfdng kich thich day than kinh va cd v&n binh thudng nhUng thdi tri da thay doi, kich thich day than kinh tren cho bi thUOng thay mat hoac giam dan truyen. Trong mot so trUdng hpp kich thich day than kinh b&ng dong dien galvanic va faradic deu co phan tfng dien nhay hOn binh thudng (sd do Guilleminot - hinh 2.3).
- Thdi ky toan phat (vai ngay, vai thang, co khi hang nam)
Phan tfng dien galvanic va faradic doi vdi day than kinh giam dan tdi mat han.
Kich thich cua cd doi vdi dong dien faradic cung giam dan. Rieng doi vdi dong dien galvanic thi dtfdc chia ra ba giai doan:
Tuan le dau: phan tfng giam nhe.
Tuan 2,3 den 2 thang: phan tfng lai nhay hOn (ngtfdng kich thich giam xuong).
Sau hai thang: phan tfng giam dan dong thdi xuat hien phan tfng Remark, phan tfng Erb dtfOng tinh CDD > CDA, chi so” ngtfdng faradic/galvanic ldn hdn 2. Thdi tri tang len cao dan roi gitf d mtfc cao, tiep sau dd xuat hien phan tfng chieu doc.
Neu tien trien xau dan: tinh chat co cd ngay cang cham dan, phan tfng Erb ngay cang dtfOng tinh manh, phan tfng chieu doc cang ro, sau do dap tfng cua cd doi vdi dong dien faradic mat va tiep theo thi dap tfng cua cd do! vdi dong dien galvanic cung mat h^n.
Hinh 2.3: Sd do tien trien cua cac kich thich day than kinh va cd trong phan Cfng thoai hoa dien (theo Guilleminot)
- Phan ling thoai hoa dien hoan toan
Phan tfng thoai hoa dien hoan toan cung chiia han da tien liipng xau. Trong qua trinh hoi phuc spi than kinh, phan ling thoai hoa dien hoan toan co the chuyen sang phan ilng thoai hoa mot phan, roi sang ti'nh chiu kich thi'ch binh thudng. Nhiing neu trong liet kieu ngoai vi, cd bi mat than kinh hoan toan tren 1 2 - 1 4 thang (doi khi hdn niia) thi luc do do sii thoai hoa tu ln tien, cac spi cd bi huy hoai hoan toan, diipc thay doi bang to chiic md va to chiic lien ket, xuat hien xP chai cd kem theo mat phan ling co doi vdi dong dien galvanic, nghia la mat hoan toan tinh chiu kich thich dien (mat kha nang hiing phan), tinh trang nay chilng to cac bien doi xay ra trong cd khong cdn kha nang hoi phuc