Examples of a fascicle are the subthalamic fasciculus and the lenticular fasciculus. A nerve fascicle, or fasciculus is a bundle of funiculi. Fascicular tachycardia usually arises from the posterior fascicle of the left bundle branch. The left posterior fascicle transmits impulses to the papillary muscles, leading to mitral valve closure. The thicker left posterior fascicle bifurcates, with one fascicle being in the septal aspect. It consists of the single species with persistent fascicle sheaths. Tachycardias originating in the anterior left fascicle would lead to right axis deviation. The extensor coccygis is a slender muscle fascicle, which is not always present. The right bundle branch contains one fascicle. The muscle fibers within a fascicle are surrounded by the endomysium. Subsection "Strobus" has five needles per fascicle and thin cone scales with no prickles. Conduction to the ventricle would therefore be via the remaining fascicle. "Cimex" pierces the skin of its host with a stylet fascicle, rostrum, or "beak". Section "Pinus" has two or three needles per fascicle. The poem is contained at the end of the second fascicle (foll.