BIOL 67A SI Session Activity 11/22 by SI https://padlet.com/fs_si/247jreklf4j4y8q en-us 2022-11-23 00:04:08 UTC 2022-11-23 01:02:29 UTC hello@padlet.com Muscle spindle apparatus https://padlet.com/fs_si/247jreklf4j4y8q/wish/2394848776 group of myofibers (intrafusal muscle fibers) encased in CT running parallel with (extrafusal muscle fibers). ]]> 2022-11-23 00:52:11 UTC https://padlet.com/fs_si/247jreklf4j4y8q/wish/2394848776 Two types of intrafusal muscle fibers. Section 2 https://padlet.com/fs_si/247jreklf4j4y8q/wish/2394850248 nuclear bag and nuclear chain. nuclear bag is la and group 2 afferents wrapped around center of myofiber. nuclear chain has only group 2 afferents. The nuclear bag is the velocity. The nuclear chain is length. Due to intrafusal muscle fibers running parallel with the extrafusal muscle fibers, they will undergo the same length changes when the extrafusal muscle fibers contract as long as they can contract along with them]]> 2022-11-23 00:53:59 UTC https://padlet.com/fs_si/247jreklf4j4y8q/wish/2394850248 Groups. Section 1 https://padlet.com/fs_si/247jreklf4j4y8q/wish/2394851052 group 1a is the largest and rapidly conducting fibers (nuclear bag) . Group 2 are smaller and conduct more slowly (nuclear chain). Muscle spindle is a group of myofibers (intrafusal muscle fibers) encased in CT running parallel with (extrafusal muscle fibers). They do position and movement.]]> 2022-11-23 00:54:57 UTC https://padlet.com/fs_si/247jreklf4j4y8q/wish/2394851052 Section 3 https://padlet.com/fs_si/247jreklf4j4y8q/wish/2394851479 The Golgi tendon organ is inserted into the tendon of a muscle, and the opposite end is connected to a muscle fascicle. It is a monosynaptic reflex but still requires interneurons. The Ib sensory nerve ending is wrapped in collagen bundles. The muscle spindles will respond to both length changes (stretch) and the speed of that stretch while GTOs monitor the contraction. Together, they give the sensations of proprioception and kinesthesia.]]> 2022-11-23 00:55:27 UTC https://padlet.com/fs_si/247jreklf4j4y8q/wish/2394851479 Reflex arc https://padlet.com/fs_si/247jreklf4j4y8q/wish/2394855345 Use monosynaptic send afferent directly to synapse on the motor efferent as result muscle give more neural interaction send inhibitory signal to relax. 
inhibitory signal provided by neural integration called reciprocal innervation]]> 2022-11-23 00:59:43 UTC https://padlet.com/fs_si/247jreklf4j4y8q/wish/2394855345