Neural Implant Aw ye sɛbɛn ɲɛ U. lajɛ
Fɛɛrɛko sɛbɛn dafalenw kan ɲɛnayeli ɲɛgɛnɛsira kan, i n’a fɔ fɛnɲɛnɛmako ɲɛfɔli, stimulation protocoles, system architecture, ani implementation notes.
1. Sistɛmu jɔcogo
1.1 Kunnafoni kunbabaw
See U sɔgɔsɔgɔninjɛ-minɛn in dilannen don ni fɛnba saba ye minnu bɛ baara kɛ ɲɔgɔn fɛ walasa ka kunnafoniw yelenw minɛ, k’u baara, k’u ci k’u ɲɛsin baarakɛla ka ɲɛnayeli-yɔrɔ fɔlɔ ma.
Kɛnɛma yɔrɔ
- • Kamera CMOS (16MP) ye.
- • Baarakɛyɔrɔ min bɛ baara kɛ
- • Batiri kɛnɛma (2500mAh) .
- • RF ka cikan cibaga
Farikolo jukɔrɔla yɔrɔ
- • RF sɔrɔbaga
- • Siginidenw ɲɛnabɔbaga
- • Batiri min bɛ se ka don a kɔnɔ
- • Elektɔri ɲɛminɛbaga
Kɔnɔbara kɔnɔ yɔrɔ dɔ
- • 1024-ɛlektrɔni sɛrɛkili
- • Substrat flexible (sɔgɔsɔgɔninjɛ) min bɛ se ka wuli
- • Interface neuronale (sɔgɔsɔgɔninjɛ-yɔrɔ).
- • Impedansi sensɛriw
1.2 Kunnafoni-falen-falen
Jaa minɛcogo
CMOS kamera bɛ FPS frame 60 minɛ ni 1920x1080 ye. Sensɔrɔlan min bɛ se ka sɛgɛsɛgɛli kɛ kosɛbɛ (fo ka se ISO 6400 ma) bɛ yeelen dɔgɔya baara dɛmɛ.
Preprocessing (baarakɛcogo ɲɛfɛ).
Ɔridinatɛri-yeli-cogo-minɛnw bɛ dakunw dɔnni, danfara min bɛ se ka ladamu, ani mankan dɔgɔyali baara. Ja in bɛ jigin ka kɛ karti 32x32 ye k’a sɔrɔ a bɛ kunnafoni nafamaw mara.
Karta min bɛ kɛ ni ɲɛdawolo ye
Yɔrɔ ja koordinatɛriw bɛ karti ka kɛɲɛ ni jɔyɔrɔw ye minnu bɛ bɛn u ma ɲɛnayeli-yɔrɔ la, ka tugu V1 retinotopic organisation naturelle kɔ.
Kodeli min bɛ mɔgɔ bila ka wale kɛ
Kuran wulicogo misaliw bɛ dilan ni paramɛtɛrɛ ɲumanw ye (amplitude, frequency, duration) kuran kelen-kelen bɛɛ kama ka da pixel intensity kan min bɛ bɛn o ma.
RF ka cikan
Donan kodɔnlenw bɛ ci 13,56 MHz RF kan fari fɛ ka taa farikolo jukɔrɔla sɔrɔyɔrɔ la, ni laban ni laban latɛmɛni ye 50 ms jukɔrɔ.
Neural stimulation (sɔgɔsɔgɔninjɛ lawulili).
Elektɔri ɲɛminɛbaga bɛ biphasic pulses kɛ microélectrodes kan, ka senfagabana kɛrɛnkɛrɛnnenw bila ani ka fosfɛniw lawuli minnu bɛ ye baarakɛla fɛ.
2. Hardware (fɛnɲɛnɛmaw) ɲɛfɔli
2.1 Kɛnɛma yɔrɔ
Kamera
Processeur (porosesɛri) ye
Sebaaya
2.2 Unité min bɛ se ka don a kɔnɔ
RF sɔrɔbaga
Siginidenw ɲɛnabɔbaga
Batiri min bɛ se ka don a kɔnɔ
Farikolo-yɔrɔ-ko-yɔrɔw
3. Microélectrode (Mikoro-ɛlektrode (Micro-électrode) sɛrɛkili).
3.1 Elektɔriw ka fɛnw ɲɛfɔcogo
Jateminɛ kɛcogo paramɛtɛrɛw
Fɛn minnu bɛ kɛ ni fɛnw ye ani fɛn minnu bɛ datugu
3.2 Kuranko cogoyaw
Lawulili
Lakanali
Kɔlɔsili
3.3 Biocompatibilité (ɲɛnamaya kɛcogo ɲuman).
Farikoloɲɛnajɛ jaabi
PEDOT:PSS dacogo bɛ dɔ bɔ funu ni glial scarring la. Kɔlɔsiliw y’a jira ko impedansi sabatilen don san 2 ni kɔ kɔnɔ in vivo.
Masinaw ka sɛgɛsɛgɛli
Poliimidi min bɛ se ka wuli (Young’s modulus ~2.5 GPa) bɛ degun dɔgɔya ɲɛgɛnɛsira la (~1 kPa), o bɛ dɔ bɔ bɔnɛ fitininw na ka bɔ kunsɛmɛ lamagacogo la.
Stérilisation (banakisɛfagalanw tali).
Etilɛni ɔkisidi (EtO) bɛ fɛnw ni kuran nafaw mara, minnu sɛgɛsɛgɛra ka kɛɲɛ ni ISO 11135 ye.
4. Siginidenw baaracogo
4.1 Baarakɛcogo pibiliki
Taabolo fɔlɔ: Minɛni ni a labɛnni ɲɛfɛ
- • Minɛni: RGB karamɔgɔ 1920x1080 @ 60 FPS
- • Yɛlɛma donna mɔgɔ la: RGB → gris (yeelenbɔ girinya) .
- • Bɛnbaliya: Histogramme adaptatif (CLAHE) walasa ka danfara don a ni ɲɔgɔn cɛ
- • Denoising (Mankan bɔli).: Filɛri fila-fila lakanani dakunw
- • Latence (Latency) ye: <5 ms
Taabolo 2nan: Fɛnɲɛnɛmaw bɔli
- • Edge detection (dakunw dɔnni).: Sobel filɛri min bɛ kɛ ni sɛgɛsɛgɛli caman ye
- • Saliency (Salience) ye: Karta min sinsinnen bɛ danfara kan ni ɲɛnayeli ye
- • Segin-ka-bɔnye (segmentation).: Jaa–dugukolo ni adaptive threshold
- • Fɛn min ka kan ka bila jɔyɔrɔ fɔlɔ la: Fɛn minnu bɛ lamaga, olu bɛ girinya caman sɔrɔ
- • Latence (Latency) ye: <8ms
Taabolo 3nan : Smart downsampling (sɛgɛsɛgɛli hakilitigi).
- • Laɲiniw ɲɛnabɔli: 32x32 pixel (1024 jate) .
- • Fɛɛrɛ: Adaptive pooling ka kunnafoni nafamaw mara
- • Kisɛya: Cɛma maraw bɛ ɲɛnabɔli ɲuman sɔrɔ ka tɛmɛ
- • Jateminɛ kɛcogo: 8 fanga hakɛ bɛ sɔrɔ pixel kelen na
- • Latence (Latency) ye: <3ms
Taabolo 4nan : Karta kɛli ɲɛkisɛw la
- • Yɛlɛma donna: Kartezi → log-polar koordinatɛriw
- • Kɔnɔnatumuw bonya (cortical magnification).: Cɛmancɛ density (fovea) ka bon .
- • Kalibreli (kalibreli) (calibration).: Baarakɛla kelen-kelen bɛɛ ka tuning
- • Musow ka musakaw: Kurukuruni (cortical curvature distorsion) bɛ kɛ
- • Latence (Latency) ye: <2ms
Taabolo 5nan : Stimuli kodeli
- • Karta dilanni: Pixel fanga → pulse paramètres
- • Modulation (Modulation) (Modulation) (Modulation).: Pulse amplitude ani/walima frequence
- • Waati kɛcogo: Kan 1024 bɛɛ ka ɲɔgɔndɛmɛ
- • Optimisation (ɲɛnabɔli) kɛcogo ɲuman: Kalan kɛcogo ladamulen
- • Latence (Latency) ye: <2ms
⚡ Pibiliki latɛmɛni laban ni laban: <20ms (k’a ta minɛni na ka taa bila lawulili la) .
4.2 Fɛnɲɛnɛmafagalanw (algorithmes).
Kalan min bɛ kɛ ka mɔgɔw ladamu
Sitimɛ bɛ baara kɛ ni masin kalanni ye walasa ka lawulili labɛn ka bɔ baarakɛlaw ka hakilinaw ni baarakɛcogo jateminɛw na.
- • Amplitude automatique par-électrode (ɛlektrɔni kelen-kelen bɛɛ ka amplitude).
- • Perceptual contrast tuning (hakilila-ko-ɲɛnabɔli).
- • Impedansi drift musaka ye
- • Karta retinotopique personnalisé
Lamaga-lamagali kofɔli
Optique flow ani temporal prediction bɛ lag perceived tigɛ ani ka fɛn lamagannenw faamuyali ɲɛ.
- • Teliya ni sira jateminɛw
- • Sini jɔyɔrɔ extrapolation
- • Trajectoire (taamacogo) nɔgɔyali
- • Fɛn minnu bɛ taa ɲɛfɛ, olu ka kan ka bila jɔyɔrɔ fɔlɔ la
5. Kumaɲɔgɔnya
5.1 Donanw ka telemetriki
RF ka fɛnw ɲɛfɔcogo
Kumaɲɔgɔnya protocol
5.2 Jɛɲɔgɔnya lakanani
Encryption (daɲɛw sirili).
AES-128 ka kunnafoniw di waati yɛrɛ la. Minɛn kelen-kelen bɛɛ ka kilisi dabɔra ɲɔgɔndan fɔlɔ la. Session key jiginni sanga 24 o sanga 24.
Tiɲɛni
Gɛlɛya ɲɔgɔn na–jaabi kɛnɛma yɔrɔ ni fɛn donta cɛ, ka segin-ka-bɔnye ni minɛni bali. Session timeout miniti 5 kɔfɛ baarakɛbali kɔfɛ.
Lakanali min bɛ kɛ ni fɛnw ye minnu bɛ se ka fɛnw tiɲɛ
FHSS ka tɛmɛn kan 50 kan, otomatiki ɲɔgɔndan ɲɛnabɔli, ani fallback mode ka ɲɛsin RF mankanba sigidaw ma.
6. Seko ni dɔnko ɲɛnabɔli
6.1 Charge inductive (sarali inductif) (sarali inductif).
Baarakɛcogo sariyakolo
Resonant inductive coupling at 13,56 MHz bɛ fanga lase fari ma ni farikolo kɔkanna ɲɔgɔndan tɛ.
- • Transmit bobine: A cɛmancɛ ye milimɛtɛrɛ 50 ye, a bɛ wuli 10
- • Aw bɛ bobine sɔrɔ: A cɛmancɛ ye milimɛtɛrɛ 35 ye, a bɛ wuli 15
- • Baarakɛcogo ɲuman: 60–70% ni milimɛtɛrɛ 5 cɛ
- • Fanga min bɛ di: 500 mW typique, 1 W max
- • Labɛnni (Alignment) kɛ: ±10 mm kɛrɛfɛ muɲuli
Ɲɛnabɔli kafoda
PMIC kɛrɛnkɛrɛnnen dɔ bɛ chargement ni power routing ɲɛminɛ ka taa implant subsystems bɛɛ la.
- • Labɛnni: Schottky ka bɔrɔ
- • Sariyabaju: Buck 3,6V → 1,8V/3,3V ye
- • Chargement (sarali) kɛli: CC/CV ni a bɛ dabila otomatiki la
- • Lakanali: Overcurrent, overvoltage, funteni hakɛ
- • Kɔlɔsili: Coulomb counter ka état de charge
6.2 Seko ni dɔnko ɲɛnabɔli
Fanga baarakɛnafolo tila-tila
(60mW) ye.
(45mW) ye.
(30mW) ye.
(15mW) ye.
Baarakɛcogo minnu bɛ kɛ
FPS 60 wulicogo basigilen, subsystems bɛɛ bɛ sen na.
30 FPS, baarakɛcogo nɔgɔman, batiri si janya.
Stimulation (wuluwulu) bɔli; RF ni kɔlɔsili kan; kununni teliya la.
Minimal: waati ni charge detect dɔrɔn; kalo minnu bɛ ɲɛnamaya la.
7. Lakanali ni fɛnɲɛnamaw ka ɲɔgɔndɛmɛ
7.1 Sariyasunw ni seereyaw
Biocompatibilité (Biyocompatibilité) ye
- ISO 10993 ye: Furakɛminɛnw jateminɛni biologiki fɛ
- USP Kalanso VI: Sitotokisisi sɛgɛsɛgɛli
- ASTM F756 ye: Fɛn minnu bɛ se ka don mɔgɔ kɔnɔ
Kuranko lakanani
- IEC 60601-1 ye: Furakɛcogo minɛnw lakanani
- IEC 60601-2-40 ye: Neurostimulateurs (banakisɛfagalanw).
- IEEE C95.1 ye: RF ka fɛnw jiracogo danw
7.2 Lakanali fɛɛrɛw
Fɛnɲɛnɛma-minɛnw lakanani
- • Dan min bɛ yen sisan: Laadalata rezow bɛ bɔli kɛ 200μA la
- • Kurukuru-circuit (kurukuru) detekti: Otomatiki tigɛcogo bɛ <1ms kɔnɔ
- • Funteni hakɛ: Sumaya dabila ni 41°C ye
- • Kɔlɔsilikɛla: Reset kan firmware hang kan
- • Enerji tampon: Kondansɛri min bɛ kɛ ka da tugu min bɛ kɔrɔsi
Porozɛw lakanani
- • Danbeya: CRC kan firimiwɛri ni paramɛtiriw kan
- • Stim dantigɛliw: Validation (dafa) bɛ fɛn caman Changement (Yɛlɛma) bɛɛ kan
- • Ko kɛlenw sɛbɛnfura: Fault ani anomalie tariku
- • Mode lakananen: Defaults conservateurs (kɔrɔsigiw) ye
- • OTA ka kunnafoni kuraw: Aw bɛ a lakana ni rollback ye
Kɔlɔsili kɛli ka taa a fɛ
- • Elektɔri Z: A bɛ kɛ 100ms o 100ms
- • Joto la kupandikiza: Sensɔrɔlan naani tilalen don
- • Batiri ye: SOC ni SOH ka ɲɛnamaya
- • RF jɛgɛnsira: RSSI ani fili hakɛ
- • Charge pikiri kɛlen: Per-électrode integrateur (ɛlektrɔni kelen-kelen bɛɛ lajɛlen).
7.3 Lakanali sɛgɛsɛgɛli
In vitro (banakisɛfagalanw) kɔnɔ
- • Senfagabana selilɛriw sɛnɛcogo
- • Sitotoxicité (banakisɛfagalanw) (cytotoxicity).
- • Nɔgɔli
- • Sɛgɛn min bɛ kɛ ni masinw ye
- • Kuranko cogoya jirali
In vivo kɔnɔ
- • Baganw ka misaliw
- • Farikoloɲɛnajɛ jaabi
- • Baarakɛcogo sɛgɛsɛgɛliw
- • Kuntilenni kuntaalajan
- • Histologie (banakisɛw ka ɲɛnamaya kɛcogo).
Kɛnɛyaso
- • Fɛn min bɛ se ka kɛ
- • Majaribio ya usalama
- • Nafa sɔrɔli
- • Kuntilenni kuntaalajan
- • Ko jugu minnu bɛ kɛ
8. Laɲiniw (protocoles) minnu bɛ kɛ ka mɔgɔw bila ka wuli
8.1 Lawulili paramɛtiriw
Waveform (wale) cogoya
Pulses biphasic symétrique : fasa katodi fɔlɔ, o kɔfɛ fasa anodiki. 50 μs inter-pulse gap ka ɲɛsin capacitive discharge ma. <1% charge balancée walasa ka elektrɔkimiki camanba bali.
Fasa katodiki (min bɛ mɔgɔ bila ka wuli).
- • Amplitude: 10–200 μA (a bɛ se ka tunun) .
- • A kuntaala: 100–500 μs
- • Polarite (Polarity): Negatif (Negatif) ye
- • Siginiden: Kɛrɛnkɛrɛnnenya la
Anodi (recovery) fasa
- • Amplitude: A bɛ bɛn katodiki ma
- • A kuntaala: A bɛ bɛn katodiki ma
- • Polarite: Pozitif (Positif) ye
- • Siginiden: Kɛrɛnkɛrɛnnenya la
Fanga hakɛ kɔlɔsili min bɛ ye
Fosfɛni fanga bɛ sɛgɛsɛgɛ cogo saba la minnu bɛ ɲɔgɔn dafa:
Sisan a hakɛ bɛ se 10–200 μA ma; a bɛ bɛn logaritmi ma ni yeelen ye min bɛ ye. Nivo 8 discrets ka ɲɛsin baarakɛcogo ɲuman ma.
Pulse hakɛ bɛ se 50–300 Hz ma; hakɛ caman bɛ kalan ka ɲɛ, nafa bɛ a la ka ɲɛsin kunkanko ɲuman ma k’a sɔrɔ a ma kuran labɛn kokura.
100–500 μs ye; sɔgɔsɔgɔninjɛ janw bɛ charge caman pikiri kɛ ani ka yeelen bɔ, o dan ye elektrɔkimisi lakanani ye.
8.2 Kodeli fɛɛrɛw
Yɔrɔko kodɔn
Karta tilennen ka bɔ ja pixel kelen-kelen bɛɛ la ka taa a ka array electrode la, min bɛ bɛn ni retinotopic cortical layout ye.
- • Laɲini: 32x32 → 1024 ye fɛnɲɛnamafagalanw ye
- • Kɔnɔnatumuw bonya (cortical magnification).: Santiri dense
- • Yɛlɛma donna: Log-polar fovea modɛli
- • Kalibreli (kalibreli) (calibration).: Baarakɛla kelen-kelen bɛɛ ka tuning
Waati kodɔnni
Lawulili waati bɛ fɛn caman kofɔ ka tɛmɛ fanga kan, n’o ye lamaga, dunni ani salience ye.
- • Burst (Bɔli).: Tɛrɛnw bɛ taa fɛnw lamaga-lamagali kama
- • Sinsinnan: Fasa danfaralen yɔrɔw cɛma
- • Waati cogoyaw: Texture kode (kode) minnu bɛ kɛ
- • Tasi ladamuni: Rate tracks bɛ danfara don
8.3 Ɲɛnabɔli ni mɔgɔya
Calibration fɔlɔ
Dɔgɔkun fila fo dɔgɔkun naani walasa ka dantigɛliw ni baarakɛyɔrɔ lakananenw sigi yɔrɔ kelen-kelen bɛɛ la:
- Hakilila hakɛw (10–50 μA cogoya la) .
- Dusudon hakɛ (100–150 μA cogoya la) .
- Karta retinotopique ladamulen
- Waati-yɔrɔ-ko-ɲɛnabɔli (hakɛ, bonya) .
- Patɔrɔn sɛgɛsɛgɛli nɔgɔmanw
Ladamuni kɛli tuma bɛɛ
Sistɛmu bɛ kalan sɔrɔ waati kɔnɔ ka bɔ ninnu na:
- • Baarakɛla ka donta: Bololabaara yeelen/danfara
- • Baara ɲɛtaa: Navigasiyɔn ni dɔnni jatew
- • Z drift (Drift) ye: Auto correction (otomatiki latilenni).
- • Baara kɛ ni misaliw ye: Tumuni min bɛ kɛ tuma caman na
- • Plasticité neuronale (sɔgɔsɔgɔninjɛ plastiki).: Segin-ka-bɔnye (recalibration) min bɛ kɛ waati jan kɔnɔ
Mode kɛrɛnkɛrɛnnenw
Profil minnu jɔra ka kɔn walasa ka baara kɛ ni u ye mɔgɔw fɛ:
Kɛrɛnkɛrɛnnenya la, dakunw danfara ka bon, lamaga dɔgɔman
Lamaga, a juguya ani a balilanw
Ɲɛda, fɛnw ani cogoya jiralanw
Tɔnɔ ni danfara min bɛ se ka ladamu