lecture 6 0.0 / 5 ? PsychologyBiological PsychologyUniversityNone Created by: The ShrewCreated on: 18-05-16 10:35 2 ways brain communicates with body Nerves- autonomic nervous system- quick and short lasting/ Hormones- slower and longer lasting 1 of 27 Hormones produced in the Hypothalamus (in the Diencephalon) 2 of 27 Hormones are chemical messengers that are secreted by a Gland or cell 3 of 27 They are secreted into The blood stream and bind to cells that have their receptors 4 of 27 Things can be both hormones and neurotransmitters and do different things Just depends on the receptor 5 of 27 Testosterone has an embroyological origin in Pituitary gland- Rathke's pouch and floor of diencephalon 6 of 27 Or it can be produced in the roof of the mouth! not neural 7 of 27 Hypothalamus controls pituitary gland with 2 mechanisms Anterior- controlled with blood (not actually part of nervous system)/ Posterior- neural connection 8 of 27 Anterior mechanism for testosterone Hypothalamus produces Gonadotropin releasing hormone into bloodstream and binds to cell in anterior pituitary 9 of 27 This produces two hormones Follice stimulating hormone (FSH) and Luteinising hormone 10 of 27 FSH Stimulates sertoli cells-> inhibin-> sperm 11 of 27 Luteinising hormone Released all over body- reacts in both testes and ovaries- stimulates leydig cells-> testosterone 12 of 27 By default the human body is Female (**) 13 of 27 Androgen insensitivity syndrome XY chromosomes but still a woman- no period but no receptors for testosterone 14 of 27 Anabolic steroids like testosterone- increase muscle mass 15 of 27 Testosterone and inhibin go All over the body- when recepted in the pituitary gland and hypothalamus inhibits gonadotropin secretion, FSH and LH 16 of 27 Negative feedback Regulates levels 17 of 27 2 hormones produces in the posterior pituitary Vaspressin (thirst)/ Oxytocin (labour, lactation but also NT in brain that creates trust) 18 of 27 Blood sugar- non-hormonal signal controlled by Insulin- low blood sugar= pancreas releases sugar/ high blood sugar= insulin released 19 of 27 Neuroplasticity Neurogenesis- creation of neurones/ Reorganisation of cortex 20 of 27 In adult mammals substantial neurogenesis is restricted to the hippocampus and olfactory bulb 21 of 27 How many neurones per hour are added to the hippocampus in humans? 2000 22 of 27 Increased with Exercise, diet and chewing hard things 23 of 27 Monkey's motor cortex Trained an task that required use of digits- motor map representation expanded 24 of 27 Can't make new neurones in motor cortex but Number and strength of synapses change, more dendrites, more receptors, new blood vessels 25 of 27 Professor P Right side of face sagged, speech problems, balance problems, fatigue- started african drumming and got better! neurones rearranged 26 of 27 Down syndrome is ...% genetic 100% 27 of 27
Comments
No comments have yet been made