Podcast
Questions and Answers
What is done after rendering the frog unconscious through stunning?
What is done after rendering the frog unconscious through stunning?
- Pithing to destroy the brain and spinal cord (correct)
- Inducing convulsions in the frog's limbs
- Blowing on the frog's head again
- Dissecting the frog's muscles
What is the purpose of pithing in the nerve muscle preparation process?
What is the purpose of pithing in the nerve muscle preparation process?
- To render the frog unconscious
- To destroy the brain and spinal cord (correct)
- To prepare the frog for stunning
- To induce convulsions in the frog's limbs
What is the purpose of stunning the frog in the nerve muscle preparation process?
What is the purpose of stunning the frog in the nerve muscle preparation process?
- To destroy the brain and spinal cord
- To prepare the frog for dissection
- To render the frog unconscious (correct)
- To induce reflex and voluntary movements
Where is the pithing needle pushed during the pithing process?
Where is the pithing needle pushed during the pithing process?
What is done to destroy the brain during pithing?
What is done to destroy the brain during pithing?
Why are the muscles of the frog's limbs thrown into convulsions during pithing?
Why are the muscles of the frog's limbs thrown into convulsions during pithing?
What happens to the limbs of the frog once the cord has been properly destroyed?
What happens to the limbs of the frog once the cord has been properly destroyed?
What is done after cutting through the skin around the trunk below the forelimbs?
What is done after cutting through the skin around the trunk below the forelimbs?
What action indicates that the frog is now 'dead' in the experiment?
What action indicates that the frog is now 'dead' in the experiment?
What is done after lifting up the urostyle and seeing the sciatic and other nerves emerging from the vertebral column?
What is done after lifting up the urostyle and seeing the sciatic and other nerves emerging from the vertebral column?
What happens when branches of the sciatic nerves are snipped away during dissection?
What happens when branches of the sciatic nerves are snipped away during dissection?
What is the purpose of cutting off the tibia-fibula below the knee joint and the thigh bone just above the point to which the sciatic nerve has been freed?
What is the purpose of cutting off the tibia-fibula below the knee joint and the thigh bone just above the point to which the sciatic nerve has been freed?
What action indicates that a piece of vertebral column has been correctly divided into two pieces?
What action indicates that a piece of vertebral column has been correctly divided into two pieces?
What indicates that the sciatic nerves have been successfully freed to about 2 cm above the knee joints?
What indicates that the sciatic nerves have been successfully freed to about 2 cm above the knee joints?
What is done after cutting through the fascia covering the thigh muscles?
What is done after cutting through the fascia covering the thigh muscles?
What should be done after placing a stout all-pin through each knee joint?
What should be done after placing a stout all-pin through each knee joint?
Flashcards are hidden until you start studying
Study Notes
Nerve-Muscle Preparation Process
- After stunning the frog, it is pithed to destroy the brain and spinal cord.
Pithing Process
- Pithing involves pushing a pithing needle through the foramen magnum (hole at the base of the skull) to destroy the brain.
- The brain is destroyed to render the frog 'dead' for the experiment.
- During pithing, the muscles of the frog's limbs are thrown into convulsions.
Dissection
- After cutting through the skin around the trunk below the forelimbs, the urostyle is lifted up to expose the sciatic and other nerves emerging from the vertebral column.
- After lifting up the urostyle, the sciatic nerve is freed from the vertebral column.
- When branches of the sciatic nerves are snipped away during dissection, the nerve is isolated.
Freeing the Sciatic Nerve
- Cutting off the tibia-fibula below the knee joint and the thigh bone just above the point to which the sciatic nerve has been freed allows the nerve to be isolated.
- When a piece of vertebral column is divided into two pieces, it indicates that the nerve has been successfully freed.
- Freeing the sciatic nerve to about 2 cm above the knee joints indicates successful dissection.
Final Preparations
- After cutting through the fascia covering the thigh muscles, the nerves and muscles are exposed.
- After placing a stout all-pin through each knee joint, the specimen is ready for experimentation.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
