RHYTHMIC MUSCULAR CONTRACTIONS

Rhythmic premature ventricular contractions.

Scenario: This is a bedside ECG strip of lead I and the accompanying arterial waveform in a 24-year-old female trauma patient. She presented 24 hours earlier to the emergency department after an all-terrain vehicle accident in which she sustained multiple injuries to her head, neck, torso, abdomen, and limbs. ECG PUZZLER A regular feature of the American Journal of Critical Care, the ECG Puzzle...

Analysis of rhythmic rectal contractions during filling cystometry in women.

PURPOSE Rhythmic or random rectal contractions independent of bladder activity are frequently observed during cystometry and usually attributed either to a neurological disease, or to ageing. The aim of our study was to search for an association of rhythmic rectal contractions (RRCs) with a specific lower urinary tract symptom or/and an urodynamic diagnosis. MATERIALS AND METHODS The populati...

Rhythmic muscular activation pattern for fast figure-eight movement.

OBJECTIVE To address the question of how the CNS generates muscle activation patterns for complex gestures, we have chosen to study a figure-eight movement. We hypothesized that the well defined rhythmic aspect of this figure will provide further insights into the temporal features of multi-muscular commands. METHODS Subjects performed, as fast as possible, figure-eights initiated in the cent...

Eccentric contractions lead to myofibrillar dysfunction in muscular dystrophy.

It is commonly accepted that skeletal muscles from dystrophin-deficient mdx mice are more susceptible than those from wild-type mice to damage from eccentric contractions. However, the downstream mechanisms involved in this enhanced force drop remain controversial. We studied the reduction of contractile force induced by eccentric contractions elicited in vivo in the gastrocnemius muscle of wil...

Graduated Muscular Contractions—A Short Description of Principles and Technique