PMID- 713184
OWN - NLM
STAT- MEDLINE
DCOM- 19790126
LR  - 20190827
IS  - 0021-521X (Print)
IS  - 0021-521X (Linking)
VI  - 28
IP  - 3
DP  - 1978
TI  - Characteristics of optic nerve innervation in the rat superior colliculus as 
      revealed by field potential analysis.
PG  - 347-65
AB  - With lightly anesthetized rats, field responses to single optic nerve (ON) and 
      optic chiasm shocks were studied in superficial layers of the superior 
      colliculus, i.e., St. zonale (SZ), St. griseum superficiale (SGS) and St. opticum 
      (SO). Based upon characteristics in the depth profile of the field response 
      within the superficial layers, we identified three zones of N3, N2, and N1 from 
      the SZ in this order. The narrow N2-zone was localized around the middle part of 
      the SGS and less distinct than the other two zones. The N3-zone was characterized 
      by a N3-wave and the N1-zone with N1- and P3-waves. N3- and P3-waves were 
      activated by slowly conducting ON fibers (5.0 +/- 1.4 and 4.2 +/- 0.6 m/sec, 
      respectively) while the N1-wave was by fastest conducting fibers (16.3 +/- 4.1 
      m/sec). According to recent Golgi studies, hypothetical mechanisms underlying the 
      three waves were proposed: the N3-wave was ascribed to the activities of small 
      vertical fusiform cells in the SZ or the upper half of SGS, the N1-wave to those 
      of narrow field vertical cells which predominate in the lower half of SGS, and 
      the P3-wave to those of wide field vertical cells whose somata are in the lower 
      half of SGS or in the SO. The N3-, N1-, and P3-waves were found to differ from 
      each other in recovery function tested with double ON shocks as well as in the 
      topographical analysis of amplitudes through a whole extent of the colliculus. 
      The three systems represented by the three waves were suggested to play different 
      roles in visual information processing within the superficial strata.
FAU - Fukuda, Y
AU  - Fukuda Y
FAU - Suzuki, D A
AU  - Suzuki DA
FAU - Iwama, K
AU  - Iwama K
LA  - eng
PT  - Journal Article
PL  - Japan
TA  - Jpn J Physiol
JT  - The Japanese journal of physiology
JID - 2985184R
SB  - IM
MH  - Animals
MH  - Electric Stimulation
MH  - Electrodes
MH  - Evoked Potentials
MH  - Optic Chiasm/physiology
MH  - Optic Nerve/*physiology
MH  - Rats
MH  - Superior Colliculi/cytology/*physiology
EDAT- 1978/01/01 00:00
MHDA- 1978/01/01 00:01
CRDT- 1978/01/01 00:00
PHST- 1978/01/01 00:00 [pubmed]
PHST- 1978/01/01 00:01 [medline]
PHST- 1978/01/01 00:00 [entrez]
AID - 10.2170/jjphysiol.28.347 [doi]
PST - ppublish
SO  - Jpn J Physiol. 1978;28(3):347-65. doi: 10.2170/jjphysiol.28.347.