DOI Page / Citation link:
https://doi.org/10.11588/diglit.4812#0063
NERVOUS SYSTEM. $3
guishable by their joints, which I could trace to or from the cords of nerves
connected to the ganglia; so that the fibrous jointed texture, proper to the
nerves in other parts of their course, was neither lost, nor changed, within
the ganglia, into a substance quite different from nerve *.
The jointed fibres within the ganglia have, however, in their interHices*
or seem covered and incrusted by a quantity of hard substance, of a yellow-
ish colour, in the ox, and in some of the human ganglia, as that in the
trunk of the fifth pair, but rather of a reddish brown in the greater num-
ber of the ganglia in a man, upon which many blood-vesfels are disper-
sed f.
SECT. IV.
The cords that come out from the under end of a ganglion are generally
larger than those which go in to the upper end of it, as authors J have
remarked; thus, the nerves issuing from the semilunar ganglia, seem much
more bulky than the rami splanchnici which go into them ||. But in the
course of the sympathetic nerve we see, in some places, exceptions to this
rule.
S E C T. V.
The last, and not least remarkable, observation to be made concerning
the ganglia, and nerves connected with them, is, that, although the great-
er number of nervous threads do, perhaps, run in the direction supposed
by authors, that is, from the head downwards to the feet, yet every nerve
connected with a ganglion, appears to contain cords, running in opposite
directions, ascending, for instance, and descending. Or where nerves are
connected to the upper, under, and outer part or side of a ganglion, which
O k
* See Tab. XX. Tab. XXI. Tab. XXII. Tab. XXIIL
t See Tab. XX. Fig. i. 2. 4. Tab. XXII. Fig. 6.
t Mechel, M. de l'Acad. a Berlin, 1749- P- 95- § *9-
II Sec Tab. XXII. Fig. 5.
guishable by their joints, which I could trace to or from the cords of nerves
connected to the ganglia; so that the fibrous jointed texture, proper to the
nerves in other parts of their course, was neither lost, nor changed, within
the ganglia, into a substance quite different from nerve *.
The jointed fibres within the ganglia have, however, in their interHices*
or seem covered and incrusted by a quantity of hard substance, of a yellow-
ish colour, in the ox, and in some of the human ganglia, as that in the
trunk of the fifth pair, but rather of a reddish brown in the greater num-
ber of the ganglia in a man, upon which many blood-vesfels are disper-
sed f.
SECT. IV.
The cords that come out from the under end of a ganglion are generally
larger than those which go in to the upper end of it, as authors J have
remarked; thus, the nerves issuing from the semilunar ganglia, seem much
more bulky than the rami splanchnici which go into them ||. But in the
course of the sympathetic nerve we see, in some places, exceptions to this
rule.
S E C T. V.
The last, and not least remarkable, observation to be made concerning
the ganglia, and nerves connected with them, is, that, although the great-
er number of nervous threads do, perhaps, run in the direction supposed
by authors, that is, from the head downwards to the feet, yet every nerve
connected with a ganglion, appears to contain cords, running in opposite
directions, ascending, for instance, and descending. Or where nerves are
connected to the upper, under, and outer part or side of a ganglion, which
O k
* See Tab. XX. Tab. XXI. Tab. XXII. Tab. XXIIL
t See Tab. XX. Fig. i. 2. 4. Tab. XXII. Fig. 6.
t Mechel, M. de l'Acad. a Berlin, 1749- P- 95- § *9-
II Sec Tab. XXII. Fig. 5.