Robertson R M, Laverack M S
Proc R Soc Lond B Biol Sci. 1979 Nov 30;206(1163):209-33. doi: 10.1098/rspb.1979.0102.
The labrum of decapod crustaceans is a soft lobe overhanging the mouth. The labral skeleton, musculature and innervation of Homarus gammarus are described. There are three bilateral groups of sensory neurons innervating the floor, lobe and lateral walls of the labrum. These are probably responsible for the phasic afferent activity that can be recorded from the inner labral nerve on mechanical deformation of the labrum. The labrum undergoes rhythmical retraction-protraction movements during ingestion and is shown to be active during both mandibular activity and oesophageal peristalsis. Studies were made on the duration and frequency of labral "swallowing" activity. The role of the labrum in feeding is discussed.
十足目甲壳动物的唇是悬于口上方的柔软叶状结构。本文描述了螯虾的唇骨骼、肌肉组织和神经支配。有三组双侧感觉神经元支配唇的底部、叶和侧壁。这些神经元可能是唇受到机械变形时，从唇内神经记录到的阶段性传入活动的原因。在摄食过程中，唇会进行有节奏的收缩 - 伸展运动，并且在下颌活动和食管蠕动期间均表现活跃。研究了唇“吞咽”活动的持续时间和频率。讨论了唇在摄食中的作用。
