Document (#23834)

Author

Stevens, C.F.

Title

¬An evolutionary scaling law for the primate visuaö system and its basis in cortical function.

Source

Nature. 2001, Nr.411 vom 10.5.2001, S.193-195

Year

2001

Abstract

Charles Stevens, of the Salk Institute in La Jolla, California, takes a still different approach, arguing that the number of cells can tell you more than the volumes of different regions. "Our brain is no different from a mouse's," he says, "but we have a lot more of it." Stevens has counted the cells in two regions of the cortex: the lateral geniculate nucleus (LGN), one of the first destinations for nerve signals from the retina, and the primary visual cortex, the next port of call for LGN messages. He found that, in a range of primate species, the number of cells in the primary visual cortex is proportional to the number of cells in the LGN raised to the power of 1.5. So a human uses four times as many neurons to process the input from each LGN neuron as a tarsier, a small Asian primate. Stevens suggests that bigger animals with bigger eyes need proportionally more cortical cells to process the information they receive without sacrificing resolution.

Footnote

Vgl. auch: http://www.nature.com/nsu/010510/010510-10.html

Field

Kognitionswissenschaft

Similar documents (author)

1. Stevens, N.D.: ¬The flaw of subject access in the library catalog : an opinion (1984) 5.36

   5.3574047 = sum of:
     5.3574047 = weight(author_txt:stevens in 1878) [ClassicSimilarity], result of:
       5.3574047 = fieldWeight in 1878, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.571848 = idf(docFreq=21, maxDocs=42740)
         0.625 = fieldNorm(doc=1878)
   

2. Stevens, N.D.: Evaluating reference books in theory and practice (1986) 5.36

   5.3574047 = sum of:
     5.3574047 = weight(author_txt:stevens in 4593) [ClassicSimilarity], result of:
       5.3574047 = fieldWeight in 4593, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.571848 = idf(docFreq=21, maxDocs=42740)
         0.625 = fieldNorm(doc=4593)
   

3. Stevens, N.D.: Public libraries and the Internet / NREN : new challenges, new opportunities (1992) 5.36

   5.3574047 = sum of:
     5.3574047 = weight(author_txt:stevens in 6249) [ClassicSimilarity], result of:
       5.3574047 = fieldWeight in 6249, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.571848 = idf(docFreq=21, maxDocs=42740)
         0.625 = fieldNorm(doc=6249)
   

4. Stevens, N.D.: First-hand reflections on the realities of reference service (1995) 5.36

   5.3574047 = sum of:
     5.3574047 = weight(author_txt:stevens in 1814) [ClassicSimilarity], result of:
       5.3574047 = fieldWeight in 1814, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.571848 = idf(docFreq=21, maxDocs=42740)
         0.625 = fieldNorm(doc=1814)
   

5. Stevens, N.D.: ¬The importance of the verb in the reference question (1988) 5.36

   5.3574047 = sum of:
     5.3574047 = weight(author_txt:stevens in 2583) [ClassicSimilarity], result of:
       5.3574047 = fieldWeight in 2583, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.571848 = idf(docFreq=21, maxDocs=42740)
         0.625 = fieldNorm(doc=2583)
   

Similar documents (content)

1. Zhang, J.; An, L.; Tang, T.; Hong, Y.: Visual health subject directory analysis based on users' traversal activities (2009) 0.19

   0.19337991 = sum of:
     0.19337991 = product of:
       0.9668995 = sum of:
         0.013616821 = weight(abstract_txt:from in 113) [ClassicSimilarity], result of:
           0.013616821 = score(doc=113,freq=4.0), product of:
             0.039062534 = queryWeight, product of:
               1.0318993 = boost
               2.7887225 = idf(docFreq=7144, maxDocs=42740)
               0.01357431 = queryNorm
             0.3485903 = fieldWeight in 113, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               2.7887225 = idf(docFreq=7144, maxDocs=42740)
               0.0625 = fieldNorm(doc=113)
         0.012620267 = weight(abstract_txt:more in 113) [ClassicSimilarity], result of:
           0.012620267 = score(doc=113,freq=1.0), product of:
             0.058944363 = queryWeight, product of:
               1.2675885 = boost
               3.4256759 = idf(docFreq=3778, maxDocs=42740)
               0.01357431 = queryNorm
             0.21410474 = fieldWeight in 113, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4256759 = idf(docFreq=3778, maxDocs=42740)
               0.0625 = fieldNorm(doc=113)
         0.015831495 = weight(abstract_txt:different in 113) [ClassicSimilarity], result of:
           0.015831495 = score(doc=113,freq=1.0), product of:
             0.068561114 = queryWeight, product of:
               1.3670868 = boost
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.01357431 = queryNorm
             0.23091069 = fieldWeight in 113, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.0625 = fieldNorm(doc=113)
         0.037343793 = weight(abstract_txt:visual in 113) [ClassicSimilarity], result of:
           0.037343793 = score(doc=113,freq=1.0), product of:
             0.106131695 = queryWeight, product of:
               1.388782 = boost
               5.629804 = idf(docFreq=416, maxDocs=42740)
               0.01357431 = queryNorm
             0.35186276 = fieldWeight in 113, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.629804 = idf(docFreq=416, maxDocs=42740)
               0.0625 = fieldNorm(doc=113)
         0.8874871 = weight(abstract_txt:cells in 113) [ClassicSimilarity], result of:
           0.8874871 = score(doc=113,freq=4.0), product of:
             0.7500684 = queryWeight, product of:
               5.8375683 = boost
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.01357431 = queryNorm
             1.1832082 = fieldWeight in 113, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.0625 = fieldNorm(doc=113)
       0.2 = coord(5/25)
   

2. Leydesdorff, L.; Rafols, I.: Local emergence and global diffusion of research technologies : an exploration of patterns of network formation (2011) 0.07

   0.07094116 = sum of:
     0.07094116 = product of:
       0.59117633 = sum of:
         0.008510513 = weight(abstract_txt:from in 1446) [ClassicSimilarity], result of:
           0.008510513 = score(doc=1446,freq=1.0), product of:
             0.039062534 = queryWeight, product of:
               1.0318993 = boost
               2.7887225 = idf(docFreq=7144, maxDocs=42740)
               0.01357431 = queryNorm
             0.21786895 = fieldWeight in 1446, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.7887225 = idf(docFreq=7144, maxDocs=42740)
               0.078125 = fieldNorm(doc=1446)
         0.02798639 = weight(abstract_txt:different in 1446) [ClassicSimilarity], result of:
           0.02798639 = score(doc=1446,freq=2.0), product of:
             0.068561114 = queryWeight, product of:
               1.3670868 = boost
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.01357431 = queryNorm
             0.40819627 = fieldWeight in 1446, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.078125 = fieldNorm(doc=1446)
         0.55467945 = weight(abstract_txt:cells in 1446) [ClassicSimilarity], result of:
           0.55467945 = score(doc=1446,freq=1.0), product of:
             0.7500684 = queryWeight, product of:
               5.8375683 = boost
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.01357431 = queryNorm
             0.7395052 = fieldWeight in 1446, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.078125 = fieldNorm(doc=1446)
       0.12 = coord(3/25)
   

3. Gluck , M.: Multimedia exploratory data analysis for geospatial data mining : the case for augmented seriation (2001) 0.07

   0.0708293 = sum of:
     0.0708293 = product of:
       0.5902442 = sum of:
         0.015775334 = weight(abstract_txt:more in 215) [ClassicSimilarity], result of:
           0.015775334 = score(doc=215,freq=1.0), product of:
             0.058944363 = queryWeight, product of:
               1.2675885 = boost
               3.4256759 = idf(docFreq=3778, maxDocs=42740)
               0.01357431 = queryNorm
             0.26763093 = fieldWeight in 215, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4256759 = idf(docFreq=3778, maxDocs=42740)
               0.078125 = fieldNorm(doc=215)
         0.019789368 = weight(abstract_txt:different in 215) [ClassicSimilarity], result of:
           0.019789368 = score(doc=215,freq=1.0), product of:
             0.068561114 = queryWeight, product of:
               1.3670868 = boost
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.01357431 = queryNorm
             0.28863835 = fieldWeight in 215, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.078125 = fieldNorm(doc=215)
         0.55467945 = weight(abstract_txt:cells in 215) [ClassicSimilarity], result of:
           0.55467945 = score(doc=215,freq=1.0), product of:
             0.7500684 = queryWeight, product of:
               5.8375683 = boost
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.01357431 = queryNorm
             0.7395052 = fieldWeight in 215, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.078125 = fieldNorm(doc=215)
       0.12 = coord(3/25)
   

4. Koch, C.: Consciousness : confessions of a romantic reductionist (2012) 0.06

   0.05662657 = sum of:
     0.05662657 = product of:
       0.4718881 = sum of:
         0.005957359 = weight(abstract_txt:from in 562) [ClassicSimilarity], result of:
           0.005957359 = score(doc=562,freq=1.0), product of:
             0.039062534 = queryWeight, product of:
               1.0318993 = boost
               2.7887225 = idf(docFreq=7144, maxDocs=42740)
               0.01357431 = queryNorm
             0.15250826 = fieldWeight in 562, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.7887225 = idf(docFreq=7144, maxDocs=42740)
               0.0546875 = fieldNorm(doc=562)
         0.07765512 = weight(abstract_txt:neurons in 562) [ClassicSimilarity], result of:
           0.07765512 = score(doc=562,freq=1.0), product of:
             0.15001369 = queryWeight, product of:
               1.1675136 = boost
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.01357431 = queryNorm
             0.5176536 = fieldWeight in 562, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.0546875 = fieldNorm(doc=562)
         0.38827562 = weight(abstract_txt:cells in 562) [ClassicSimilarity], result of:
           0.38827562 = score(doc=562,freq=1.0), product of:
             0.7500684 = queryWeight, product of:
               5.8375683 = boost
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.01357431 = queryNorm
             0.5176536 = fieldWeight in 562, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.0546875 = fieldNorm(doc=562)
       0.12 = coord(3/25)
   

5. Marx, W.; Bornmann, L.; Barth, A.; Leydesdorff, L.: Detecting the historical roots of research fields by reference publication year spectroscopy (RPYS) (2014) 0.05

   0.054763656 = sum of:
     0.054763656 = product of:
       0.6845457 = sum of:
         0.0189304 = weight(abstract_txt:more in 3239) [ClassicSimilarity], result of:
           0.0189304 = score(doc=3239,freq=1.0), product of:
             0.058944363 = queryWeight, product of:
               1.2675885 = boost
               3.4256759 = idf(docFreq=3778, maxDocs=42740)
               0.01357431 = queryNorm
             0.3211571 = fieldWeight in 3239, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4256759 = idf(docFreq=3778, maxDocs=42740)
               0.09375 = fieldNorm(doc=3239)
         0.6656153 = weight(abstract_txt:cells in 3239) [ClassicSimilarity], result of:
           0.6656153 = score(doc=3239,freq=1.0), product of:
             0.7500684 = queryWeight, product of:
               5.8375683 = boost
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.01357431 = queryNorm
             0.8874062 = fieldWeight in 3239, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.09375 = fieldNorm(doc=3239)
       0.08 = coord(2/25)