Page 184 - Lượng giá chức năng hệ vân động

- Nhom ca tam dau dui (H am string): Co hai dinh ngay triidc va sau khi
cham got. Dinh dau tien xay ra trong giai doan du khi xuat hien chuoi dong md
(openkinetic chain) - dd la khi dat chan xuong nen chiia viing - va hoat dong nay
lam giam toe sii du ra triidc cua chan bang tac dong duoi hong va gap goi. Thdi
diem ban chan dat viing chac xuong nen, chuoi dong md chuyen sang chuoi dong
dong (close kinetic chain) va cd tam dau dui giii cho go'i khong gap hdn. Chung
hoat dong nhii la bo phan giam chan dong va cung gifl cho hong khong gap qua.
- Ca m ong to: Cd hoat dong manh nhat d dau giai doan chong khi khoi liidng
cua cd the diidc chuyen dan ra phan trUdc cua mui ban chan. Cd hoat dong nham
lam dudi hong de diia than ra triidc.

- Nhom ca gap hong: Cac cd that liing - chau, cd may, cd lUdc, cd cang mac
rong hoat dong d cuoi giai doan chong va dau giai doan du. Khi di tren mat bang,
cd that liing - chau that sii khong hoat dong, nhUng khi cac cd gap hong khac bi
yeu thi cd that liing chau hoat dong de thay the.
- Nhom ca dang: Gom cd mong viia va nho. Cac cd hoat dong khdi dau trong
thi cham got va ky dau cua giai doan chong de on dinh cho chau nghieng 5°. Trong
giai doan nay, khoi liidng than ngiidi cd khuynh hiidng ha khung chau phia chan
du. Hoat dong cua cd cham diit khi giai doan chong kep bat dau.

- Nhom ca khep: Nhom cd nay hoat dong d dau va cuoi giai doan chong vdi
tac dung la de kiem soat cac cii dong nghieng ben cua than ngiidi.
- Cac ca duoi cot song: Nhom cd nay hoat dong sau khi got chan cung ben
cham dat va ngon chan doi ben rdi dat. Dieu nay cd nghia la, khi got chan cham
dat, nhom cd duoi cot sdng ca hai ben deu hoat dong de ngan ngiia than ngUdi do
ra triidc.

II. THLf NGHIEM GAN LOC QUA PHAN TICH DANG DI

Neu nhii benh nhan co kha nang di lai thi qua phan tich dang di, ngiidi kham
cd the danh gia sd bo diidc cd hay nhom cd nao bi yeu triidc khi thu nghiem dinh
bac bang thu cd bang tay. Thii nghiem gan loc lam thu ngan diidc thdi gian thii cd
va lam benh nhan dd met so vdi khi phai tien hanh thu toan bo cac cd.

1. Thi cham got (chan phai)

1.1. Mau binh thudng nhin nghieng (hinh 11.2)

1) Dau va than thang diing. Tay phai d phia sau diidng giiia than minh vdi

khuyu duoi; tay trai d phia triidc vdi khuyu gap mot phan.
2) Khung chau xoay it ve triidc.

3) Goi phai duoi.
4) Ban chan phai gan thing goc vdi cing chan.

183