1. mid brain+hind brain = brain stem
2. FOREBRAIN
2.1. Cereberum
2.1.1. major part of brain
2.1.2. two cerebral hemispheres
2.1.2.1. connected by a tract of nerve fibres called corpus callosum
2.1.2.2. cerebral cortex: layer of cells which covers cerebral hemisphere
2.1.2.2.1. thrown into folds
2.1.2.2.2. known as grey matter
2.1.2.2.3. grey in color
2.1.2.2.4. neuron cell bodies are concentrated here
2.1.2.2.5. contains
2.1.2.3. fibres of tracts are covered with myelin sheath constituting inner part of cerebral hemisphere
2.1.2.3.1. opaque white in appearance
2.1.2.3.2. called white matter
2.1.3. wraps around thalamus
2.1.3.1. major coordinating centre for sensory and motor signalling
2.2. Hypothalamus
2.2.1. lies at the base of thalamus
2.2.2. contains no of centres which controls
2.2.2.1. body temperature
2.2.2.2. urge for eating and drinking
2.2.3. contains several neurosecretory cells
2.2.3.1. which secretes Hypothalamic hormones
2.3. Thalamus
2.3.1. major coordinating centre for sensory and motor signalling
2.4. inner part of cerebral hemisheres and group of associated structures
2.5. limbic lobe/limbic system
2.5.1. inner part of cerebral hemisheres and group of associated structures (amygdala & hippocampus)
2.5.2. along with hypothalamus ,it is involved in regulation of
2.5.2.1. sexual behaviour
2.5.2.2. expression of emotional reactions
2.5.2.2.1. excitement
2.5.2.2.2. fear
2.5.2.2.3. rage
2.5.2.2.4. pleasure
2.5.2.3. motivation
3. MID BRAIN
3.1. located between
3.1.1. thalamus/hypothalamus of forebrain
3.1.2. pons of hindbrain
3.2. CEREBRAL AQUEDUCT(a canal) passes through it
3.3. CORPORA QUADRIGEMINA
3.3.1. four round swellings
3.3.2. present on dorsal portion
4. HIND BRAIN
4.1. pons
4.1.1. consists of fibres tracts that interconnect different regions of brain
4.2. cerebellum
4.2.1. has very convoluted surface area to provide additional space for many more neurons
4.3. medulla oblongata
4.3.1. connected to spinal cord
4.3.2. contains centres which control
4.3.2.1. respiration
4.3.2.2. cardiovascular reflexes
4.3.2.3. gastric secretions
4.3.2.4. sneezing
4.3.2.5. vomiting
4.3.2.6. coughing