its body«
Although & …” report on its central nervous
possess the function of secretion.
it is interesting to know
system
has not yet been published, it will no doubt afford
that Scharrer in his study of the sh brain became the pioneer
very
valuable knowledge for evolutronal neurology.
in the study of the neurosecretory function which is widely
observed today in the central nervous system of animals.
| therefore conclude that, in line With the foregoing studies,
Enormously large cells characteristic of some kinds of sh
research on the fish brain revealed many interesting facts
which are situated latero-dorsaliy to the fasciculus
for neurologÿ and/or neurophysiology.
longitudinalis medialis were described early by Mauthner
Experiments ÎO see the reaction by stimulating various
(1859) and they are today called Mauthner cells which call
parts of the brain % COHdUC΀d r5Î by FVÏÎSCh and HÏÎZÏg
for the attention of many research workers.
These cells
(1870) on the brains of higher animals were carried out in
have been morphologicaliy studied in detail by Beccari
sh by Ferrier (1876), especially on the forebrain and Optic
(1907) and others, and are considered to be an important
tectum WhiCh are easy to stimulate
neuron
of the reflex concerning the tail movement (p. 12}.
Later, experiments ÎO stimulate the forebrain Of sh were
Consequently this neuron has recently become valuable
also conducted by other research workers.
However, in
experimental material for electro-physiologists.
This may
view Of the lack Of technical eCi…pment, the results were
also be said for the supramedullary ganglion cells which are
not denite, but it seems clear that contrary to the case with
speciaiiy large cells situated in the medulla oblongata and
animals of higher order the stimulation of the forebrain of
cervical cord (p, 12) and were found many years ago in
5h does not induce somatic movement.
The experiment
some
sh (Fritsch, 1886).
Studies are being made on the
ÎO stimulate the optio tectum was made in detail by
evoked potentials produced in Mauthner cells and bers
Chauchard and Chauchard (1927) and Ten Cate
(Tasaki et al., 1954) and supramedullary ganglion cells
Their ndings were not denite, but suggested that in the
(Hagiwara and Saito, 1959; Bennett, Grain and Grundtest,
tectum of the sh there exists an area relating to the
1959) by placing micro-electrodes in them.
somatic movement 5UCh 35 “”le motor COF΀X Of higher
Prior to the recent studies such as those mentioned above,
animals.
However, a series Of careful 5ÎUdÏ€S by Akert
the electro-physiological study of the sh brain was carried
(1947) showed that the tectum of the sh per‘forms direct
out by Adrian in 1930,
As a pioneer work, Adrian and
motor coordination.
Buytendiik (1931) recorded the EEG relating to the
Early in 1878 Fritsch found a new nerve in vertebrates, i.e.,
respiratory movements of goldsh.
Hoagland (1933)
nervus terminalis in Gale… cam”s.
Pinkus (1895) traced this
recorded spike—potentials towards sound from acoustic
nerve
in Pr0t0pîerus from the nasal sac to the hypothalamus
turbercle of catsh, goidsh and trout and became the
and paved the way for many ndings in all classes of the
forerunner of the workers in the electrophysiological study
vertebrates including man which were made in later
of the lateral line system.
Adrian and Ludwig (1938)
years (p. 8).
investigated the potential changes of the olfactory tract in
While the existence of saccus vasculosus, an organ peculiar
response to various stimulations with catsh, carp and
to sh, had already been known, the study in detail of the
Tz‘nca and later contributed to the electro-physiological
structure was commenœd by Boeke (1901).
Even today,
study of both the olfactory bulb and olfactory lobe of the
the function of this relatively large structure is not clearly
sh and the analysis Of olfaotion.
As the optio tectum
understood and is a subject of interest to ichthyologists and
of lower animals is known as a structure which has a
comparative physiologi5ts as will be noted later (p. 9).
specially important meaning, an Adrian group made an
Nucleus which consists of large cells is present on both sides
electro-physiological study about the tectum of the sh.
Of the preoptic recessus of hypothalamus
of the sh brain
Besides Adrian and his group, especially Buser (1949), in a
(p. 8).
This is called the nucleus preopticus magnocellularis,
series of experiments studied in detail the electrical
and for many years students of the sh brain have noted
responses in the optio tectum and acquired abundant
it.
However, Scharrer (1928) found that these nerve cells
knowledge on this subject.
Although & …” report on its central nervous
possess the function of secretion.
it is interesting to know
system
has not yet been published, it will no doubt afford
that Scharrer in his study of the sh brain became the pioneer
very
valuable knowledge for evolutronal neurology.
in the study of the neurosecretory function which is widely
observed today in the central nervous system of animals.
| therefore conclude that, in line With the foregoing studies,
Enormously large cells characteristic of some kinds of sh
research on the fish brain revealed many interesting facts
which are situated latero-dorsaliy to the fasciculus
for neurologÿ and/or neurophysiology.
longitudinalis medialis were described early by Mauthner
Experiments ÎO see the reaction by stimulating various
(1859) and they are today called Mauthner cells which call
parts of the brain % COHdUC΀d r5Î by FVÏÎSCh and HÏÎZÏg
for the attention of many research workers.
These cells
(1870) on the brains of higher animals were carried out in
have been morphologicaliy studied in detail by Beccari
sh by Ferrier (1876), especially on the forebrain and Optic
(1907) and others, and are considered to be an important
tectum WhiCh are easy to stimulate
neuron
of the reflex concerning the tail movement (p. 12}.
Later, experiments ÎO stimulate the forebrain Of sh were
Consequently this neuron has recently become valuable
also conducted by other research workers.
However, in
experimental material for electro-physiologists.
This may
view Of the lack Of technical eCi…pment, the results were
also be said for the supramedullary ganglion cells which are
not denite, but it seems clear that contrary to the case with
speciaiiy large cells situated in the medulla oblongata and
animals of higher order the stimulation of the forebrain of
cervical cord (p, 12) and were found many years ago in
5h does not induce somatic movement.
The experiment
some
sh (Fritsch, 1886).
Studies are being made on the
ÎO stimulate the optio tectum was made in detail by
evoked potentials produced in Mauthner cells and bers
Chauchard and Chauchard (1927) and Ten Cate
(Tasaki et al., 1954) and supramedullary ganglion cells
Their ndings were not denite, but suggested that in the
(Hagiwara and Saito, 1959; Bennett, Grain and Grundtest,
tectum of the sh there exists an area relating to the
1959) by placing micro-electrodes in them.
somatic movement 5UCh 35 “”le motor COF΀X Of higher
Prior to the recent studies such as those mentioned above,
animals.
However, a series Of careful 5ÎUdÏ€S by Akert
the electro-physiological study of the sh brain was carried
(1947) showed that the tectum of the sh per‘forms direct
out by Adrian in 1930,
As a pioneer work, Adrian and
motor coordination.
Buytendiik (1931) recorded the EEG relating to the
Early in 1878 Fritsch found a new nerve in vertebrates, i.e.,
respiratory movements of goldsh.
Hoagland (1933)
nervus terminalis in Gale… cam”s.
Pinkus (1895) traced this
recorded spike—potentials towards sound from acoustic
nerve
in Pr0t0pîerus from the nasal sac to the hypothalamus
turbercle of catsh, goidsh and trout and became the
and paved the way for many ndings in all classes of the
forerunner of the workers in the electrophysiological study
vertebrates including man which were made in later
of the lateral line system.
Adrian and Ludwig (1938)
years (p. 8).
investigated the potential changes of the olfactory tract in
While the existence of saccus vasculosus, an organ peculiar
response to various stimulations with catsh, carp and
to sh, had already been known, the study in detail of the
Tz‘nca and later contributed to the electro-physiological
structure was commenœd by Boeke (1901).
Even today,
study of both the olfactory bulb and olfactory lobe of the
the function of this relatively large structure is not clearly
sh and the analysis Of olfaotion.
As the optio tectum
understood and is a subject of interest to ichthyologists and
of lower animals is known as a structure which has a
comparative physiologi5ts as will be noted later (p. 9).
specially important meaning, an Adrian group made an
Nucleus which consists of large cells is present on both sides
electro-physiological study about the tectum of the sh.
Of the preoptic recessus of hypothalamus
of the sh brain
Besides Adrian and his group, especially Buser (1949), in a
(p. 8).
This is called the nucleus preopticus magnocellularis,
series of experiments studied in detail the electrical
and for many years students of the sh brain have noted
responses in the optio tectum and acquired abundant
it.
However, Scharrer (1928) found that these nerve cells
knowledge on this subject.