+ Site Statistics
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Spectral sensitivity of human infants at absolute visual threshold

, : Spectral sensitivity of human infants at absolute visual threshold. Vision Research 21(7): 1005-1016

The forced-choice preferential looking technique (FPL) was used in conjunction with an infrared television viewing system to measure the dark-adapted visual sensitivity of human infants at 1 and 3 mo. of age. Absolute thresholds of 1 mo. olds were about 50 times higher than adults and those of 3 mo. olds were about 10 times higher. Spectral sensitivity at 1 mo. matched the CIE [International Commission of Illumination] scotopic luminosity function at wavelengths longer than 430 nm; at wavelengths shorter than 430 nm there was an elevation in sensitivity but it was not statistically significant. Spectral sensitivity at 3 mo. matched the CIE scotopic luminosity function at all wavelengths. It was concluded that rods in the eyes of human infants contain rhodopsin by 1 mo. of age; that the scotopic system is functional and more sensitive than any cone system by 1 mo. of age; and that even in very young infants a single quantal absorption may be sufficient to generate a behaviorally meaningful signal in a rod photoreceptor.

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 006459868

PMID: 7314480

DOI: 10.1016/0042-6989(81)90004-3

PDF Full Text: Spectral sensitivity of human infants at absolute visual threshold

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Pachera, P.; Pavan, P.G.; Todros, S.; Cavinato, C.; Fontanella, C.G.; Natali, A.N., 2016: A numerical investigation of the healthy abdominal wall structures. The present work aims to assess, via numerical modeling, the global passive mechanical behavior of the healthy abdominal wall under the action of pressures that characterize different daily tasks and physiological functions. The evaluation of a no...

Prasad, D., 1976: Forestry planning and changing concepts of management. The present state of forestry planning in India is discussed in relation to the existing forest resources. Inadequate management control has allowed much indiscriminate felling and some overexploitation. There is no coordinated programme for refor...

Anonymous, 1975: Council classifies fluoride mouthrinses. Council on Dental Therapeutics. Journal of the American Dental Association 91(6): 1250-1251

L.C.uankui; Meng Jin; Wang Yuanqing, 2007: Dawsonolagus antiquus, a primitive lagomorph from the Eocene Arshanto Formation, Nei Mongol, China. A new lagomorph, Dawsonolagus antiquus, gen. et sp. nov., collected from the possible late early Eocene Arshanto Formation of Nei Mongol (Inner Mongolia), China, is described. The material includes a partial skull with P (super 4) -M (super 2) on...

Dai, J.; Yu, X.; Huang, S.; Fan, L.; Zhu, G.; Sun, H.; Tang, X., 2015: Relationship between sagittal spinal alignment and the incidence of vertebral fracture in menopausal women with osteoporosis: a multicenter longitudinal follow-up study. To investigate the relationship between sagittal spinal alignment and the incidence of vertebral fracture in patients with osteoporosis. A cohort of 1,044 postmenopausal women with osteoporosis were prospectively observed for the incidence of lumb...

Koffron, A.; Stein, J.A., 2008: Liver transplantation: indications, pretransplant evaluation, surgery, and posttransplant complications. Liver transplantation is the therapeutic option of choice for acute and chronic end-stage liver disease. The indications and contraindications to liver transplantation have become established, as has the operative and postoperative management. Thi...

Smith, C.L.; Mansour, J.M., 2000: Indentation of an osteochondral repair: Sensitivity to experimental variables and boundary conditions. The sensitivity of the affects of indenter radius, defect depth, cartilage permeability and flow boundary conditions, on the indentation testing of a repairing osteochondral defect was investigated. Since the boundary condition on the flow across...

Chen, X-xia.; Zhang, J.; Lv, C-xu.; Sun, Q-feng., 2015: Construction and identification of cbfa1 and satb2 co-expression vector. To construct a lentiviral eukaryotic expression vector containing two genes of cbfa1 and satb2. The aim genes of cbfa1 and satb2 were amplified from plasmids by PCR. After TA cloning, the positive clones were identified by restrictive enzyme diges...

Hirasaki, S.; Tanimizu, M.; Moriwaki, T.; Hyodo, I.; Shinji, T.; Koide, N.; Shiratori, Y., 2004: Efficacy of clinical pathway for the management of mucosal gastric carcinoma treated with endoscopic submucosal dissection using an insulated-tip diathermic knife. Objective Recently, the cases of early gastric carcinomas which can be treated by endoscopic submucosal dissection (ESD) method have been increasing in our institute. Simple and precise guidelines for treating mucosal gastric carcinoma are necessa...

Krasavin, M.; Lukin, A.; Zhurilo, N.; Kovalenko, A.; Zahanich, I.; Zozulya, S., 2016: Novel agonists of free fatty acid receptor 1 (GPR40) based on 3-(1,3,4-thiadiazol-2-yl)propanoic acid scaffold. 1,3,4-Thiadiazole was explored as a more polar, heterocyclic replacement for the phenyl ring in the 3-arylpropionic acid pharmacophore present in the majority of GPR40 agonists. Out of 13 compounds synthesized using a flexible, three-step protocol...