scholarly journals Observations on Pigmentary Co-ordination in Elasmobranchs

1936 ◽  
Vol 13 (4) ◽  
pp. 460-466
Author(s):  
URSULA WYKES
Keyword(s):  
Electrical Stimulation ◽  
Chloride Solution ◽  
The State ◽  
Posterior Region ◽  
Dorsal Aorta ◽  
Secondary Effect ◽  
Spinal Nerves ◽  
Pectoral Fins ◽  
Stimulation Of

1. Section of the spinal nerves to the pectoral fins in Raia brachyura, R. maculata and Scyllium canicula had no effect on the state of the chromatophores in the black adapted fish, nor did it prevent the development of uniform pallor on a white ground. 2. Electrical stimulation of (a) spinal nerves to the pectoral fins, (b) the haemal canal, (c) the skin, in Raia brachyura, Rhina squatina and Scyllium catulus did not result in any chromatophore changes. 3. Excised skin of Raia brachyura, R. maculata, Rhina squatina and Scyllium canicula placed in adrenaline chloride solution showed little or no change in melanophore index during one hour and could not be differentiated from control pieces placed in elasmobranch Ringer. 4. The injection of adrenaline chloride caused a slight paling in Raia brachyura and Rhina squatina. This may be a secondary effect due to the vaso-constrictor action of this hormone. 5. White adapted specimens of Raia brachyura, which were placed on a black ground after ligature of the dorsal aorta, became dark anterior to the point of ligature within 3 hours. The posterior region was still completely pale at this time and did not become fully dark for 24 hours.

Dermatome mapping in the rat hindlimb by electrical stimulation of the spinal nerves

1994 ◽  
Vol 168 (1-2) ◽  
pp. 85-88 ◽  
Author(s):  
Yuzuru Takahashi ◽  
Yoshio Nakajima ◽  
Takashi Sakamoto
Keyword(s):  
Electrical Stimulation ◽  
Spinal Nerves ◽  
Stimulation Of

scholarly journals The Development of Motor Responses in the Stomach of the Foetal Sheep

1951 ◽  
Vol 28 (1) ◽  
pp. 32-40
Author(s):  
D. L. DUNCAN ◽  
A. T. PHILLIPSON
Keyword(s):  
Electrical Stimulation ◽  
Motor Activity ◽  
Extended Period ◽  
The State ◽  
Motor Responses ◽  
Sustained Activity ◽  
Stimulation Of

The state of motor activity of the stomach was studied in a series of foetal sheep. The non-functional period was found to end between the 50th and 60th days of gestation. Sustained activity was preceded by short periods of myogenic and neuromotor activity, and was not in evidence until the 70th day. Foetal swallowing commenced soon after this, but the pattern of suckling behaviour developed gradually over an extended period. The motor mechanisms mediated by the vagus were studied by section and electrical stimulation of the nerve.

Mapping of dermatomes of the lower extremities based on an animal model

1995 ◽  
Vol 82 (6) ◽  
pp. 1030-1034 ◽  
Author(s):  
Yuzuru Takahashi ◽  
Kazuhisa Takahashi ◽  
Hideshige Moriya
Keyword(s):  
Animal Model ◽  
Electrical Stimulation ◽  
Lower Extremity ◽  
Lower Extremities ◽  
Plasma Extravasation ◽  
Low Back ◽  
Content Type ◽  
Spinal Nerves ◽  
Fine Print ◽  
Stimulation Of

✓ Previous dermatome drawings have been developed on the basis of investigations in humans and thus differ among investigators. The authors recently reported detailed dermatomes of the rat hindlimb that were mapped by electrical stimulation of spinal nerves and observation of plasma extravasation in the corresponding skin. In this paper a new human dermatome chart is proposed that has been reconstructed from rat dermatomes; the accuracy of previously reported dermatomes is also discussed. These newly defined dermatomes are arranged as serial semicircles, not as bands extending spirally from the low back down to the lower extremity as shown by Keegan. The posterior pattern differs markedly from that of any previously described charts in that the S-2 dermatome is “interposed” within the S-1 dermatome. This study clarifies the basic arrangement of lower-extremity dermatomes. Based on the present chart, it is concluded that Bonica's dermatomes are the most accurate among those previously reported.

Electrical stimulation of sacral spinal nerves for treatment of faecal incontinence

The Lancet ◽  
1995 ◽  
Vol 346 (8983) ◽  
pp. 1124-1127 ◽  
Author(s):  
K.E Matzel ◽  
U Stadelmaie ◽  
F.P Gall ◽  
M Hohenfellner
Keyword(s):  
Electrical Stimulation ◽  
Faecal Incontinence ◽  
Spinal Nerves ◽  
Stimulation Of

scholarly journals EFFECTS OF THE DENTAL GRINDING AND THE ELECTRICAL STIMULATION OF N. TRIGEMINUS UPON THE STATE OF THE LOW BLOOD PRESSURE

1959 ◽  
Vol 9 (3) ◽  
pp. 271-276
Author(s):  
Toshihiro KIMURA ◽  
Mitsuko MATSUO ◽  
Hisao FUKUDA ◽  
Hajime SASA
Keyword(s):  
Blood Pressure ◽  
Electrical Stimulation ◽  
The State ◽  
Low Blood Pressure ◽  
Stimulation Of

A comparison of magnetic and electrical stimulation of spinal nerves

1990 ◽  
Vol 13 (5) ◽  
pp. 414-420 ◽  
Author(s):  
B. A. Evans ◽  
J. R. Daube ◽  
W. J. Litchy
Keyword(s):  
Electrical Stimulation ◽  
Spinal Nerves ◽  
Stimulation Of

scholarly journals IV. Note on the motor roots of the brachial plexus, and on the dilator nerve of the iris

1883 ◽  
Vol 35 (224-226) ◽  
pp. 229-232 ◽  
Keyword(s):  
Electrical Stimulation ◽  
Royal Society ◽  
Cervical Nerve ◽  
Spinal Nerves ◽  
Functional Relations ◽  
King's College ◽  
Physiological Laboratory ◽  
Dorsal Nerve ◽  
Stimulation Experiments ◽  
Stimulation Of

In a communication to the Royal Society (published in the “Proc. Roy. Soc.,” vol. 32, 1881) on the "Functional Relations of the Motor Roots of the Brachial and Lumbo-Sacral Plexuses,” my colleague, Professor Gerald Yeo, and myself gave an account of the results of electrical stimulation of the several motor roots of the brachial and crural plexuses in the monkey. We there described the muscular actions of the upper extremity as resulting from stimulation of the first dorsal up to the fourth cervical nerve. The careful dissections made at our request by Mr. W. Tyrell Brooks, Demonstrator in the Physiological Laboratory, King’s College, and a repetition of the stimulation experiments which I have mad have revealed an error in the enumeration of the roots of the braclii; plexus, which, in common with Professor Yeo, I wish to correct. Wha we took for the first dorsal nerve has proved in reality to he t! second dorsal. Hence the results of the experiments must be read applying to the spinal nerves from the second dorsal to the fift cervical respectively, instead of from the first dorsal to the fourt cervical, as stated in our paper.

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