Abducens: description na Anatomy, ayyuka da kuma siffofin

Abducens da dangantaka da wani inji cewa shirya da motsi na da idanu. Rawar da ya taka a can ne ba don haka nauyi a matsayin oculomotor, amma a yanayin saukan asarar aiki, da ikon ganin wasu har rasa. Ga wani m ido motsi dole shida tsokoki da cewa an innervated ta uku girman kwanyar jijiyoyi.

haltta

Abducens da dangantaka da m mota jijiyoyi. Yana fara a cikin tsakiya, wanda aka located a cikin midbrain. Zaruruwa shi a fadin gada saukar zuwa muhimmi surface na kwakwalwa da kuma matsa a kwarin kunya tsakanin da pons da dala, dake a cikin medulla oblongata.

Core matakai wuce ta cikin rufi na kwakwalwa da kuma ne a cikin cavernous sinus. Akwai, zaruruwa ne a kan m gefen carotid jijiya. Bayan jijiya bar sinus, da ya shiga cikin manya orbital fissure kuma a karshe da dama a cikin falaki. Abducens innervates daya kawai tsoka - mike gefe.

aiki

Abducens samar da guda aiki, wanda ya aikata wani tsoka innervated da su, kuma ta kawar da ido waje. Wannan ba ka damar duba wurin, ba tare da juya kansa. Kazalika wannan tsoka ne antagonist na ciki rectus tsoka daga cikin ido da na jan da eyeball ga cibiyar, a cikin shugabanci na hanci. Sun soke juna fita.

Duk da haka, tare da shan kashi na daya daga cikinsu, akwai mai convergent ko bamban strabismus, kamar yadda wani m tsoka mamaye da kuma sabon, juya da eyeball a gefe. Abducens maimaita, don haka shi bayar da wani m ido ƙungiyoyi da kuma binocular hangen nesa.

binciken

Duba zama ruwan dare abducens da kuma ta aiki a halin yanzu mataki na ci gaba da magani ba zai yiwu. Saboda haka, neurologists da ophthalmologists nazari sau daya a kowace uku jijiyoyi: oculomotor, kanti da kuma wani gungu. Wannan ba wani karin cikakken hoto na shan kashi.

Yawancin fara da gunaguni na biyu hangen nesa, wanda aka karfafa a lokacin da kallon abin ya shafa gefe. To, akwai wani gani dubawa na haƙuri ta fuska domin sanin da fasali, gaban kumburi, redness, da kuma sauran manifestations na kumburi tsari. Bayan haka, mai raba nazari ga ido protrusion ko karyata na eyeball, ptosis daga cikin manya fatar ido.

Gwama bukata nisa daga cikin ƴan da su mayar da martani ga haske (ko ba m), haduwa da kuma masauki. Haduwa - ikon mayar da hankali a kan kusa abubuwa. Domin tabbatar da shi, a fensir ko wani guduma kawo ga hanci. Kullum ƴan ya kamata a quntata. masauki binciken da aka za'ayi domin kowane ido dabam, amma cikin sharuddan da dabara, shi ya tuna duba haduwa.

Kawai bayan duk wadannan na farko jan duba ko haƙuri yana da wani squint. Kuma idan haka ne, abin da shi ne. Sai ka tambayi wa mutum ci gaba da ido a fitar domin tip neurological guduma. Wannan damar domin sanin adadin motsi na eyeballs. Assigning da guduma a cikin matsananci maki na filin da ra'ayi da kuma rike da shi a cikin wannan wuri, likita tsokani bayyanar kwance nystagmus. Idan haƙuri yana da wani Pathology na ido tsoka tsarin, da pathological nystagmus (kananan kwance ko a tsaye ido motsi) ba zai dauki dogon.

Da shan kashi na abducens

Kamar yadda aka riga aka sani, da dagawa ido jijiya ne ke da alhakin nuna na eyeball m daga hanci. Take hakkin jijiya madugu take kaiwa zuwa rushewa daga cikin motsi na kai tsaye a kaikaice tsokoki. Wannan sa convergent strabismus saboda gaskiyar cewa ciki tsoka na jan da eyeball. Asibiti, shi sa biyu da hangen nesa ko a wani kimiyya hanya, diplopia. Idan haƙuri yayi kokarin duba cikin shafa gefe, wannan alama na karuwa ne.

Wani lokaci akwai sauran pathological mamaki. Alal misali, vertigo, Gait tashin hankali da kuma fuskantarwa a sarari. Domin ganin yadda ya kamata, marasa lafiya ayan rufe haƙuri ido. Shan kashi ne kawai abducens ne musamman rare, kamar yadda mai mulkin, a hade Pathology.

Makaman nukiliya da kuma na gefe inna

Neuropathy abducens a circumferential sashe na faruwa a meningitis, kumburi da paranasal sinuses, cavernous sinus thrombosis, intracranial aneurysms kashi na carotid jijiya ko da na baya sadarwa jijiya, samu karaya da kwanyar tushe ko orbital siffofin maruran. Bugu da kari, mai guba effects a botulism da diphtheria iya lalata kwakwalwa Tsarin, ciki har da girman kwanyar jijiyoyi. Flaccid inna na abducens yiwu a matsayin at mastoiditis. Marasa lafiya lura Gradenigo ciwo: abducens paresis na ido a tare da zafi a fita site na frontal reshe na trigeminal jijiya.

Mafi sau da yawa, da makaman nukiliya take hakki faruwa kan bango na encephalitis, neurosyphilis, mahara sclerosis, hemorrhage, marurai, ko na kullum cuta na cerebral wurare dabam dabam. Tun da sallama da kuma gyara man fuska jijiya suna located gefe da gefe, da shan kashi na daya, Yanã Pathology da kuma makwabta. Akwai abin da ake kira alternating fauvillers ciwo (paresis na fuska tsokoki a kan ya shafa gefe da kuma rage ƙungiyoyi a sauran rabin gangar jikin gefen).

hadin hannu

Paresis na abducens a garesu bayyana convergent strabismus. Wannan yanayin ya auku mafi sau da yawa tare da karuwa a intracranial matsa lamba. Idan yawan sayar da giya fiye da kima, kuma zai iya zama a sāke wuri na kwakwalwa, da cewa shi ne, da latsa al'amari na kwakwalwa zuwa gangaren a tushe na ragargaje. A irin wannan labari zai iya sauƙi sha da abducens. Suka yi kawai a wannan wuri suna located a kan ƙananan surface na kwakwalwa da kuma kusan babu kare.

Akwai sauran kwakwalwa sāke wuri cewa bayyana irin cututtuka:
- indentation tonsil occipito-mahaifa Dura mazurari.
- impaction na cerebellum a cikin kwakwalwa da kuma sauran ze tashi.

Su ba su jituwa da rayuwa, don haka gaban lalacewar da abducens - shi Pathoanatomical sanarwa. Bugu da kari, shi dole ne a tuna da cewa wani rauni da kaikaice rectus tsoka - shi ne daya daga cikin cututtuka da myasthenia gravis.