NEUR 2600 Lecture Notes - Lecture 5: Cerebrospinal Fluid, Ventromedial Nucleus Of The Hypothalamus, Pineal Gland
Document Summary
The brainstem is sometimes referred to as the brain of our reptilian ancestor. The primitive brain of a developing embryo has 3 vesicles filled with cerebral spinal fluid. The early developing brain is divided into 3 sections: prosencephalon, mesencephalon, rhombencephalon. The 3 divisions develop into 5 overtime: telencephalon, diencephalon, mesencephalon, metencephalon, myelencephalon. Houses the pineal gland, which plays a role in seasonal rhythms: thalamus. Cortical relay station of the brain: hypothalamus. Pituitary gland comes out the bottom of it. Damage to the lateral hypothalamus results in aphagia (failure to eat) Damage to the ventromedial hypothalamus results in hyperphagia (over- eating) One structure of the tegmentum is the substantia nigra. Parkinson"s disease symptoms are caused by the loss of dopamine in the substantia nigra. Mixed of nuclei and fibre pathways producing a net-like appearance. Associated with sleep-wake behaviour and behavioural arousal.
