Mendelson M
J Cell Biol. 1969 Aug;42(2):548-63. doi: 10.1083/jcb.42.2.548.
The remotor muscle of the second antenna of the American lobster is functionally divided into two parts. One part produces slow, powerful contractions and is used for postural control. The other part produces very brief twitches, can follow frequencies over 100/sec without fusion and is probably used for sound production. This great speed is due, in part, to synchronous arrival of nerve impulses at multiple terminals, a very brief membrane electrical response and electrical continuity throughout large volumes of sarcoplasm. Calculations indicate that the very extensive sarcoplasmic reticulum is probably responsible for the rapid decline of tension in this muscle.
美洲龙虾第二触角的外转肌在功能上可分为两部分。一部分产生缓慢而有力的收缩,用于姿势控制。另一部分产生非常短暂的抽搐,能在不融合的情况下跟随超过100次/秒的频率,可能用于发声。这种高速度部分归因于神经冲动在多个终末同步到达、非常短暂的膜电反应以及整个大量肌浆中的电连续性。计算表明,非常广泛的肌浆网可能是该肌肉张力快速下降的原因。