Higher Mental Functions is part of the Central Nervous System section of Physiology. Practise 42 exam-style MCQs for NEET PG, FMGE, INI-CET and NEET SS, each with the correct answer and a detailed explanation.
Hippocampal consolidation, long-term potentiation, the reticular activating system and the sleep stages marked by delta waves, spindles and K-complexes headline these Higher Mental Functions MCQs, which test memory and sleep as high-yield NEET PG revision.
Memory information is stored across diffuse network of neurons in brain Synapses across those neuronal networks is strengthened by repetition of what is learned Reference: Ganong, 25th edition page no.284
Olfactory bulb has got special synaptic units called olfactory glomeruli where four types of cells are seen namely, Mitral cells Tufted cells Granule cells Periglomerular cells Reference: Ganong, 25th edition page no. 217
Reticular activating system (RAS) Is a polysynaptic pathway It plays an important role in promoting wakefulness (arousal) It receives collaterals from sensory pathways It is also involved in regulation of heart rate, blood pressure, and respiration Alpha block When attention is focused on something, the alpha rhythm is replaced by fast, irregular low-voltage activity RAS have no role in mediating alpha block Reference: Ganong, 25th edition page no.273
Brief high-frequency train of stimuli (tetanus) → long-lasting increase in amplitude of EPSP → long term potentiation secretion of excitatory neurotransmitter → acts of membrane excitatory receptor → increased membrane's permeability to Na+ → Na entry into axon RMP increases from -65 to -45mV → EPSP is +20mV Reference: Guyton & Hall, 14th edition pg no. 740
Left hemisphere Previously called Dominant hemisphere New name - categorical hemisphere Mainly concerned with language and speech Also involved in mathematical and scientific skills Right hemisphere Previously called nondominant hemisphere New name - Representational hemisphere Mainly concerned with visuospatial relations Also involved in Identification of objects form and music Reference: Ganong, 25th edition page no.291
Delta wave Frequency is Seen during deep sleep Reference: Ganong, 25th edition page no.275
Stage 2 NREM Waves with frequency 12-14 Hz called sleep spindles seen high voltage biphasic waves called K complexes also seen Reference: Ganong, 25th edition page no.273
Major Function of Hippocampus - conversion of short-term memory to long term memory (consolidation of memory) Reference: Ganong, 25th edition page no.283
Hippocampal consolidation, long-term potentiation, the reticular activating system and the sleep stages marked by delta waves, spindles and K-complexes headline these Higher Mental Functions MCQs, which test memory and sleep as high-yield NEET PG revision.
MedLadder includes 42 curated MCQs for Higher Mental Functions under Physiology (Central Nervous System), covering NEET PG, FMGE, INI-CET and NEET SS preparation.
