A reflex baka

Reflex baka - ne hanya cewa ya wuce da jijiya turu zuwa aiki jiki a kan rabe da kuma mayar. Ya kunshi biyu halves. Da yake hadaddun tsarin da kuma aikin da hadaddun reflex baka ne rufaffiyar zobe.

Sakamakon rabin shi kunshi gefe azanci shine neuron. Ya cell auku a cikin kashin baya ko intervertebral ganglia. Yana fita daga divisible cikin biyu rassan tsiro. Wani sashi na shi a matsayin wani ɓangare na wani gefe jijiya faruwa ga periphery da kuma iyakar a wani yanki na fata, zurfin nama ko mucous membrane na m na'urar. Na biyu reshe ne wani ɓangare, a hada a cikin dorsal tushen a cikin laka.

A azanci shine neurons a cikinsa zai iya yi daban-daban hanya. Wasu juya up, kuma ba tsayawa, da suka zo da medulla oblongata. Wasu ƙare a launin toka al'amarin. A lokaci guda daga kowane daga cikin azanci shine neuron a cikin laka abu tashi a daban-daban kwatance ko rassan collaterals. Wasu daga cikin su suna karya, ta hanyar da launin toka kwayoyin halitta a cikin mota Kwayoyin a cikin agara Kakakin kuma karshen rassan. Just ƙare da tsakiyar motor neuron. The kama shi ne ba ta hanyar kwatsam lambobi. Wannan shi ne saboda gaskiyar cewa reflex baka a cikin sentient bangare na wasa rawar kama da pyramidal hanya.

Karkata part kunshi gefe motor neuron. Ya cell da yake a cikin agara zankayen m kwayoyin halitta a cikin laka. Saboda haka aiwatar motsa zuwa ga na farko ta hanyar kashin baya tsokoki (gaban mota), sa'an nan ta hanyar da na gefe jijiya.

Students reflex baka gwiwa reflex hada da tuki kafa a cikin agara endings na neurons a sakamakon waje tasiri (tasiri guduma). By hangula daga cikin femoral jijiya shiga cikin laka. Daga wannan zumudi yana daukar kwayar cutar a cikin mota sel da launin toka al'amarin, da kuma kara - to tsoka. Saboda ta rage auku straightening ya kafafu a gwiwa hadin gwiwa.

Dukansu halves na wanda kunshi reflex baka, a lamba tare da juna.

Duk da cewa da reflex aiki alama ya zama m, kuma m dangane da kwakwalwa, shi ne ba haka ba. Pyramidal hanya kuma rufe perednerogovuyu keji m rassan. Saboda haka, a wasu hanya kai fitar da reflex baka, shi ne a lamba tare da shi.

A dangane da gudanar da ayyukanta neuron aiki cibiyar aka decelerating. A musamman, shi ya shafi agara reflexes.

Saboda tsokoki ne a ƙarƙashin rinjayar ji leads, wanda ya hada da reflex baka, sa'an nan, daga wani msar tambayar ra'ayi, kowane daga cikinsu na iya sa motor reflex. Bugu da ƙari kuma na farko, da kuma m akwai karin hadaddun rage shafe integers muskulaturnye kungiyar.

Saboda haka, ya kamata ya kasance quite wani gagarumin adadin rubuce m motor reflexes. Duk da haka, a yi, suna da yawa karami. Wata kila wannan shi ne saboda wani gagarumin hanawa (a wasu lokuta har zuwa halaka) da pyramidal reflexes.

The aka gyara na reflex arcs ne:

- tsoka mai amsa sigina, gabansa na muhalli ruri da kuma mayar da shi a cikin jijiyar.

- afferent hanyar wanda gudanar daga primary bayanai sarrafa rabo da CNS.

- Center "mayar da martani" (a sa na neurons, da bayanin da aka sarrafa da kuma kafa reflex).

- efferent hanya zuwa periphery na tsakiya m tsarin.

- actuator (ƙarfe ko tsoka).

- feedback.

Dangane da wuya, da rufaffiyar motsi jijiya turu iya zama da sauki. A wannan yanayin, wani ɓangare na reflex baka kunshi biyu neurons (motor kuma ji). Complex tsarin kira polysynaptic baka. Ya kunshi uku ko fiye neurons.