He than kinh la bo phan quan trong nhat cua co the . no co nhiem vu chi phoi va dieu khien moij hoat dong cua con nguoi dung tren goc do giai phau thi he than kinh gom co hai thanh phan . than kinh trung uong va than kinh ngoai bien . thanh kinh trung uong nam trong hop so va tuy song . than kinh ngoai bien gom cac hach than kinh cac day than kinh nam o vung duoi da.
Tac dung doi voi he than kinh
Nang cao nang cao nang luc lam viec cua nao lam cho hien tuong met moi lau xuat hien .
Than kinh cua chung ta lau met moi. Lam viec duoc thoi gian dai trong dieu kien phuc tap do ngoai canh gay ra thi hieu qua lao dong moi cao. Thuc chat cua lam viec khoe hay yeu la do than kinh cua ho kha nang lam viec khac nua . So sanh kha nang lam viec cua hai nguoi co ren luyen the thao thuong xuyen va nguoi khong hoat dong the duc the thao ta thay ro dieu nay .
b. cai tao duoc cac loai hinh than kinh
Khi nghien cuu hoat dong cua he than kinh cac nha sinh ly hoc thay no co dac diem
- Dac diem ve cuong do tuc qua trinh hung phan (+) va uc che(-) co trinh do cao , co kha nang chiu dung dc hung phan va uc che manh
- Dac diem thang bang tuc la qua trinh hung phan va uc che o trinh do cao, hai qua trinh nay deu nhau khong co qua trinh nao manh hon qua trinh nao
- Dac diem linh hoat tuc la hai qua trinh hung phan va uc che deu o trinh do cao va chung co kha nag chuyen hoa cho rat nhay ben de dang.
- Co 4 loai than kinh tieu bieu nhu sau
- + loai hang nong : cuong do manh nhung khong thang bang hung phan chiem uu the. Loai nay de bi kich dong kho uc che kim ham kem ng nong nay lam viec manh dan dung cam song thieu can than
- + loai linh hoat : cuong do manh , linh hoat thang bang tot loai nay co kha nag kim ham ban than tot , hieu suat cao de thich nghi voi hoan canh song
- + loai binh than ly: cuoi do manh thang bang tot nhung ko linh hoat. Nguoi co than kinh nay tram tinh it noi it bieu hien , it bieu lo tinh cam , khiem ton nhan lai.
