Pulsed near infrared laser stimulates the rat visual cortex in vivo

• Autorzy: Mou Z. X. , Hou W. S. , Zheng X. L. , Yao J. P. , Shang G. B. , Yin Z. Q.

Identyfikatory

DOI

10.1016/j.bbe.2015.02.003

• Języki publikacji: EN

Abstrakty

EN

Pulsed infrared irradiation is an alternative neural stimulation with the advantages of being non-contact, spatially precise and artifact-free. Although infrared neural stimulation (INS) is well characterized in the peripheral nervous system, research has been limited in the central nervous system (CNS), especially the near infrared with wavelength around 800 nm. To establish feasibility of INS in the CNS, pulsed near infrared laser (λ = 808 nm, pulse duration = 300–1000 μs, radiant exposure = 0.73–2.45 J/cm², fiber size = 105 μm, repetition rate = 2 Hz) was used to stimulate the primary visual cortex (V1) of anesthetized Long Evans (LE) rats and the near-infrared-evoked neural activities in V1 was recorded. The impact of the duration of infrared pulse on the intensity and the latency of evoked potentials was assessed. We found that V1 was activated by 808 nm laser and the optical evoked potential (OEP) included a descending wave (D1) and an ascending wave (A1) after optical stimuli. Furthermore, with the increase of the stimulation pulse duration, both the amplitude of D1 and the latency of A1 were increased. The results from this paper will facilitate the applications of near infrared neural stimulation on central nervous system.

Słowa kluczowe

EN

near infrared pulse; neural stimulation; laser diode; visual cortex; central nervous system

PL

bliska podczerwień; neurostymulacja; dioda laserowa; kora wzrokowa; centralny układ nerwowy

• Wydawca: Nałęcz Institute of Biocybernetics and Biomedical Engineering of the Polish Academy of Sciences ; Elsevier
• Czasopismo: Biocybernetics and Biomedical Engineering
• Rocznik: 2015
• Tom: Vol. 35, no. 4
• Strony: 247--254
• Opis fizyczny: Bibliogr. 25 poz., rys., tab., wykr.

Twórcy

autor

Mou Z. X.

• Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Institution of Biomedical Engineering, Jinan University, Guangzhou 510632, Guangdong, China; Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, China

autor

Hou W. S.

• Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, China

autor

Zheng X. L.

• Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, China

autor

Yao J. P.

• Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, China; Department of Ophthalmology, Southwest Hospital, China

autor

Shang G. B.

• Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, China

autor

Yin Z. Q.

• Department of Ophthalmology, Southwest Hospital, China

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