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What is the function of the suprapharyngeal ganglia in a earthworm?

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Effects of removal and regeneration of the suprapharyngeal ganglion on learning, retention, extinction and negative movements of Lumbricus terrestris were studied in a T maze with electrical punishment and a sandpaper cue at the incorrect side and a dark goal box at the correct side. Learning, retention and negative movements at the choice point were not affected by ganglionectomy or regeneration. Extinction was prolonged, and negative reactions to the sandpaper were increased, by ganglionectomy after training. Negative movements in the maze stem were decreased by ganglionectomy under both learning and extinction conditions, and increased abruptly after 30--50 days of postoperative training. Reactivity to shock decreased when ganglionectomy followed, but not when it preceded, learning. Frequency of correct turns was the only measure clearly changed by learning. Negative movements at the choice point tended to decrease, but inconsistently during learning. There was no evidence that discrimination of sandpaper contributed to learning. Ten trials per day produced fatigue but was not detrimental to health or vigor.
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What is the function of an earthworm's ganglia?

The Ganglia is a part of the nervous system  The Ganglia is a mass of nerve tissue existing outside the central nervous system.  To make a long story short it's a brain. 

What is the function of ganglia?

Ganglia are bundles of nerves that are found in the peripheral  nervous system. Ganglia function to connect neurological structures  and send messages between them.

What is the function of the ganglia?

  Ganglia are clusters of nerve cells. They are mostly associated with the sympathetic division of the autonomic nervous system in vertebrates, where their functions are p

What is the function of the basal ganglia?

Regulating voluntary motor activities.it helps to regulate  voluntary motor activities.Starting, stopping, and monitoring arm  swinging and galt   control of muscle tone

What are the function of the earthworm?

An earthworm eats dirt, and then when it passes through it's system and "out the other end" it is now fresh fertilizer that is really good for your garden!!!