Flaccidity
Pronunciation: flak-SID-i-tee
Complete loss of muscle tone resulting in limp, floppy muscles with absent reflexes, typically seen in lower motor neuron lesions.
Full Definition
Flaccidity represents a state of complete muscle hypotonia characterized by absent muscle tone, diminished or absent reflexes, and muscle weakness or paralysis. This condition typically results from lower motor neuron lesions, peripheral nerve injuries, or acute phases of upper motor neuron lesions (spinal shock). In rehabilitation medicine, flaccid muscles are vulnerable to overstretching, joint subluxation, and contracture development. Assessment includes manual muscle testing, reflex testing, and range of motion evaluation. Treatment focuses on maintaining joint mobility, preventing complications, and facilitating recovery through appropriate positioning, splinting, and gentle mobilization techniques.
Usage
Usage note: Distinguish from weakness - flaccidity specifically refers to loss of muscle tone, not just reduced strength.
In Context
- "Acute flaccidity in the left upper extremity requires supportive positioning to prevent shoulder subluxation." — physical therapy evaluation
- "Transition from flaccidity to developing spasticity indicates evolving neurological recovery patterns." — rehabilitation progress note