Why is sciatic nerve used in amphibian experiment?

The sciatic nerve of frogs, frequently used in experimental studies, is a mixed nerve composed of myelinated and unmyelinated fibers. Investigating the effect of HFAC waveforms on the different components of the CAP would enable us to detect the progression of block in each fiber type population within the whole nerve.

What is frog sciatic nerve?

The sciatic nerve is a large bundle of many nerve fibers. The nerve of the frog is dissected from its origin at the spinal cord as 3-4 bundles of the sciatic plexus, all the way to the gastrocnemius muscle. There the nerve divides into two branches, one to each head of the muscle.

What is nerve muscle preparation of frog?

The frog muscle-nerve preparation was a popular experimental tool that was used in India to teach skeletal muscle physiology till 1997 (2). Until then, undergraduate medical students had to make the preparation and perform experiments to demonstrate the properties of skeletal muscle.

What is a nerve bath?

Provides a drug-free, non-invasive spa-like treatment to reduce pain, tingling, and numbness in the feet due to the debilitating effects of neuropathy… Pain Management Technologies.

Why frog is used as an experimental animal?

Transparent frogs will prove useful as laboratory animals because they make it easier and cheaper to observe the development and progress of cancer, the growth and aging of internal organs, and the effects of chemicals on organs.”

What is the name of the solution for sciatic nerve preparation?

A small slip of bone/muscle is left attached to the nerve at the proximal end. A piece of thread is tied to the nerve at the distal end. The lower reservoir of the nerve bath (above) is filled with frog Ringer’s solution, making sure that the Ringer’s solution is not touching any of the wires.

What are reflex acts in frog?

Chemical stimulation of a site on the skin of the back anterior to the iliosacral joint in high spinal frogs usually elicits a rostral wiping reflex, in which the tip of the hindlimb rubs against the site; stimulation of a site near the anus elicits a caudal wiping reflex in which the heel or side of the foot rubs …

How do you pith a frog?

Remove the skin of the leg. Use dissecting scissors to cut and loosen skin around the leg.
Secure the frog with T-pins.
Separate the muscle bundles.
Cut the fascia.
Dissect the nerve.
Expose spinal cord.
Identify nerve and perform a blunt dissection.
Tie thread around nerve ends.

What are snake scientists called?

Herpetology is the branch of zoology which deals with the study of reptiles and amphibians such as snakes, turtles, and iguanas. A herpetologist is a zoologist who studies reptiles and amphibians such as frogs and salamanders. Many herpetologists focus on conservation of these species.

Why are amphibians useful?

Amphibians play essential roles, both as predators and prey, in their ecosystems. Adult amphibians eat pest insects, including those pests that damage crops or spread disease. Amphibians also have important functions in the food webs of both aquatic and terrestrial systems.

What are the characteristics of coaxial cables?

At higher frequencies, the coaxial cable takes on complex characteristics that can be best shown as a series of ‘distributed’ values of inductance, resistance, capacitance, and conductance. See Figure 2.

What is the impedance of a coaxial feeder?

Coax impedance. All feeders possess a characteristic impedance. For coaxial cable there are two main standards that have been adopted over the years. These are 75 Ω and 50 Ω. The 50 Ω coax cable is used for professional and commercial applications whereas the 75 Ω coax cable is used almost exclusively for domestic TV and VHF FM applications.

What is the capacitance of coax cable?

Capacitance of coax cable. A length of coax cable exhibits a capacitance between the inner conductor and outer shield. The capacitance varies with the spacing of the conductors, the dielectric constant, and as a result the impedance of the line.

What is the DC resistance of a coaxial cable?

The DC resistance of a coaxial cable is provided per unit length, with the resistance of the center conductor and sheath usually given separately. For example, manufacturers published data for the resistance of .500” P3 cable is 1.35 ohms per 1k ft for the center conductor and .37 ohm per 1k ft for the sheath.