refex arc | reflex arc class physiology | refex arc diagram | knee jerk

Best medical/nursing lecture explaining Stretch reflexes. Only two neurones are involved. The cell body of the lower motor neurone is stimulated directly by the sensory neurone, with no connector neurone in between The knee jerk is one example, but this type of reflex can be demonstrated at any point where a stretched tendon crosses a joint. By tapping the tendon just below the knee when it is bent, the sensory nerve endings in the tendon and in the thigh muscles are stretched. This initiates a nerve impulse that passes into the spinal cord to the cell body of the lower motor neurone in the anterior column of grey matter on the same side. As a result the thigh muscles suddenly contract and the foot kicks forward. This is used as a test of the integrity of the reflex arc. This type of reflex also has a protective function – it prevents excessive joint movement that may damage tendons, ligaments and muscles. Autonomic reflexes. These include the pupillary light reflex when the pupil immediately constricts, in response to bright light, preventing retinal damag #arcreflex #kneejerk #nervoussystem #neuro #nursing #medical #nursingmasters #nclexrn #anatomyandphysiology Join this channel to get access to perks:    / @nursingmasters   Watch these playlists now to get best nursing knowledge and clear norcet exam (nursing officers exam), entrance exams, state board exams in india and nclex rn exam Medical surgical videos    • Medical surgical nursing   Cancer videos    • cancer videos/oncology   Psychology videos    • psychology   Pharmacology videos    • Pharmacology  videos   Obstetrics playlist    • Obstetrics and Gynaecology   Nervous system    • nervous system   Immune system playlist    • immune system   Urinary system    • Urinary system   Eye videos    • eye videos   Endocrine system    • Endocrine system   Respiratory system    • Плейлист   Useful nursing videos    • Useful videos for nursing students   Mental health nursing    • Mental health nursing   Our youtube channel link    / nursingmasters   Our instgram id https://www.instagram.com/invites/con... Our website address www.nursingmasters.in If you have any queries about this video please drop your comment in the comment box i would love to answer please like,share and subscribe my channel thank you.