HEAD AND NECK ANAT,BIOCHEM,PHYSIO,MICRO,PATHO,DENTAL ANATOMY

Explore core biochemistry concepts, including enzyme structure and rate-limiting steps, metabolic pathways like glycolysis, the Krebs cycle, and electron transport chain, deoxyribonucleic acid and ribonucleic acid structure, and storage diseases.

Review key biochemistry topics, including enzyme composition with apoenzyme and coenzyme, induced fit, allosteric and feedback regulation, and major pathways like glycolysis, gluconeogenesis, glycogen metabolism, and the citric acid cycle.

Examine chemical principles in biochemistry, highlighting hydrogen bonds and water's polar, cohesive nature, and carbonic anhydrase catalyzing CO2 and water to carbonic acid and bicarbonate in RBCs and kidney.

Explore enzyme structure, coenzymes, and the induced-fit mechanism, then cover enzyme classes—oxidoreductases, transferases, hydrolases, isomerases, and ligases—along with competitive and non-competitive inhibition, allosteric regulation, feedback, and zymogen activation.

Explore carbohydrate chemistry—from monosaccharides to polysaccharides, glycogen storage diseases, and glycogen breakdown; then examine amino acids, glycosaminoglycans, lipids, and lipoproteins in health and disease.

Explore dna and rna fundamentals, nucleotides, base pairing, replication, transcription, translation, and mutations, plus pcr and blotting techniques essential to molecular biology.

Explore glycolysis as a cytoplasmic pathway that converts glucose to two pyruvate with ATP and NADH, highlighting rate-limiting enzymes (hexokinase/glucokinase, PFK-1, pyruvate kinase) and lactate formation under anaerobic conditions.

The citric acid cycle, or Krebs cycle, runs in the mitochondrial matrix. Acetyl-CoA from pyruvate dehydrogenase begins the cycle, yielding Nadh, Fadh2, and GTP for the electron transport chain.

Explore oxidative phosphorylation in the inner mitochondrial membrane. NADH and FADH2 donate electrons to oxygen via complexes I–IV and ATP synthase, with coenzyme Q and cytochrome c, forming water.

Explains the cytoplasmic hexose monophosphate pathway, producing NADPH for fatty acid and steroid biosynthesis and for maintaining reduced glutathione as an antioxidant, plus ribose-5-phosphate for nucleotide synthesis.

The lactic acid cycle, or cori cycle, shuttles lactate from muscle and rbcs to the liver for gluconeogenesis, and pyruvate dehydrogenase deficiency can cause lactic acidosis.

Convert ammonia from protein metabolism into urea in the liver's mitochondrial matrix and cytoplasm. Phosphate synthetase is the rate-limiting enzyme; its absence causes hyperammonemia, cerebral edema, lethargy, convulsions, and death.

Explore cytoplasmic fatty acid synthesis via citrate shuttle and acetyl-CoA carboxylase, forming malonyl-CoA, then mitochondrial beta-oxidation via the carnitine shuttle producing NADH, FADH2, and acetyl-CoA.

Explore water-soluble vitamins (B complex and C) and fat-soluble vitamins (A, D, E, K), their roles, and key deficiency diseases such as pellagra, scurvy, and rickets.

Explore core physiology topics essential for IMDA and ADC exam prep, including neurophysiology, muscle, cardiac, respiratory, renal, GI, and endocrine systems.

Review core physiology topics, from neuro and muscle physiology to respiration, renal function, gastrointestinal and endocrine systems, highlighting nerve conduction, blood flow, gas exchange, and hormone balance.

Explore neurophysiology concepts from ascending and descending tracks to receptors, motor pathways, and action potentials. Trace sensory pathways for vision, hearing, taste, and smell.

Compare skeletal, cardiac, and smooth muscles, detailing their sarcolemma and sarcoplasmic reticulum, thick and thin filaments, and the calcium-driven contraction cycle of actin and myosin.

Explore how blood flow properties and Laplace law govern mean arterial pressure and cardiac output. Learn preload, afterload, and the Frank-Starling concept with baroreceptors and Bainbridge reflex in regulating circulation.

Explore respiratory physiology, covering lung volumes (tidal, erv, rv, frc, ic), alveolar ventilation, dead space, gas exchange, Bohr and Haldane effects, oxygen transport, and chemoreflex control.

Explore renal physiology, including glomerular filtration, countercurrent mechanism, and nephron segments from proximal tubule to collecting duct. Learn how RAAS, ADH, and aldosterone regulate water, electrolytes, and acid-base balance.

Explore GI physiology and its enteric nervous system, intragastric reflexes triggered by duodenal chyme, and the regulation of gastric emptying, digestion, and absorption of carbohydrates, proteins, and fats.

Explore endocrine physiology with steroid, amine, and peptide hormones and second messenger signaling. Trace the hypothalamo endocrine axis and pituitary control, including TRH, TSH, ADH, oxytocin, and calcium metabolism.

Learn tooth morphology and key anatomical features, such as cross-bridge groove, fossa, height of contour, dentition classifications (heterodont, homodont, polyphyodont), numbering systems (FDI, double-digit, universal), and occlusion concepts.

Review maxillary and mandibular tooth anatomy, centric occlusion concepts, and mandible border movements, detailing height of contact, cusp patterns, and guiding versus working casts.

Review tooth morphology and dentition, covering anatomical features, embrasures, grooves, and tooth numbering, with emphasis on permanent teeth anatomy, occlusion concepts, and the anatomic versus clinical crown.

Explore the classification of dentitions and essential anatomical features such as lobes, mamelons, tubercles, ridges, grooves, and embrasures that define tooth morphology.

Compare universal, primary A–T, and FDI tooth numbering systems (1–32, A–T, 1–8/5–8) and note the central incisor mesial contour as greatest and the proximal shapes.

Explore the height of contact in maxillary and mandibular teeth, noting cervical one-third facial contacts, lingual contacts at the cingulum, and the mesial–distal mnemonic I j j m m m.

Explore maxillary and mandibular permanent teeth anatomy from central incisors to third molars, including crown features, mamelons, root forms, and occlusal principles.

Understand pulp morphology and the four canal configurations: type one single canal; type two two that merge; type three two separate exits; type four split exits at two apical foramina.

Analyze Posselt's envelope of motion, tracing border movements of the mandible across sagittal, horizontal (gothic arch), and frontal (teardrop) planes, with centric occlusion, centric relation, and rest position.

Discover the guiding and supporting cusps, centric stops, and the rules of ideal occlusion, then examine excursive jaw movements, canine guidance, and Bennett shift.

Explore protrusive, mediotrusive, and laterotrusive movements, including the Bennett movement, Bennett shift, and Bennett angle, with rules for working and non-working sides and occlusal contacts.

Explore the general microbiome—bacteria and virus structure, vaccines, and core infectious concepts—and cover oral microbiome topics, including strep mutans, periodontal microbiology, the endodontic microbiome, candida, and parasites.

Review general microbiology and host–pathogen interactions, covering prokaryotic versus eukaryotic cells, bacteria, viruses, fungi, and parasites with clinical examples and serology highlights.

Explore general microbiology foundations, including infections, bacteriology, bacterial vaccines, virology, antiviral drugs, mycology, and parasitology, and distinguish prokaryotic and eukaryotic cells, ribosomes, and viral features.

Explore head and neck infections, including abscess, granuloma, cysts, and cellulitis, with chronic inflammatory lesions, granulation tissue, angiogenesis, and macrophages, lymphocytes, plasma cells, epithelial cells, and multinucleated giant cells.

Explore bacteriology fundamentals, from prokaryotic cell structure to gram staining, capsules, and toxins. See how plasmids and transposition drive resistance and how antibiotics act in the log phase.

Explore bacterial vaccines and distinguish between live attenuated, killed, toxoid, capsular polysaccharide, and purified protein vaccines, and identify which can be used as antitoxin by reviewing the table.

Explore viral structure and life cycles, including nucleic acids, capsids, envelopes, replication in host cells, antigenic variation, and major virus families such as influenza, HIV, hepatitis, and coronaviruses.

Explore mycology basics: fungal features such as ergosterol, chitin, and polysaccharide capsules, with sexual and asexual spores. Cover common infections including dermatophytosis, candidiasis, cryptococcosis, and mucormycosis, plus routes and toxins.

Explore major human protozoal and helminth infections, including Entamoeba histolytica, Giardia lamblia, Cryptosporidium parvum, Toxoplasma gondii, Plasmodium falciparum, Taenia solium, Taenia saginata, Enterobius vermicularis, and Trichinella spiralis.

Explore core general pathology concepts from cell injury and inflammation to necrosis and immunity, including grafts, immunodeficiency, and systemic and oral disease manifestations.

Explore general pathology topics from cell injury and inflammation to immunology, developmental pathology, and neoplasia, including edema, endocarditis, tuberculosis, and concepts like dysplasia and metastasis.

Examine cell injury mechanisms, including hypoxia and chemical insults, and cellular responses such as atrophy, hypertrophy, metaplasia, and hyperplasia, plus pathologic calcification and immune mediators.

Explore cell death by comparing apoptosis and necrosis, highlight the three necrosis types: coagulative, liquefactive, and caseous, and review examples such as heart attack, brain abscess, pancreatitis, and tuberculosis.

Explore acute inflammation, from histamine-driven vasodilation and vascular permeability to neutrophil margination and phagocytosis, with exudate formation and later chronic stages with mononuclear infiltration and granulation tissue.

Describe the immune system's two lines of defense, natural and artificial immunity, and the roles of NK cells, macrophages, B and T cells, vaccines, and boosters.

Learn how opsonization coats bacteria with IgG and complement to boost phagocytosis by neutrophils. Follow the phagocytosis sequence from diapedesis to phagolysosome digestion and review antibody roles (IgG, IgA, IgM).

Explore graft types (autograft, isolo xenograft) and cytotoxic T cells driven rejection from hyperacute to chronic, including graft-versus-host reactions and ABO blood typing tests.

Explore immunodeficiency diseases, including selective IgA deficiency, Bruton agammaglobulinemia, and DiGeorge syndrome with thymic aplasia and hypocalcemia. Examine Job syndrome, SCID, viscus Eldridge syndrome, and ataxia telangiectasia, using catch-22 mnemonic.

Explore teratogens and maternal infections, including the Torch complex, that cause congenital malformations. Learn autosomal and sex chromosome abnormalities, and key genetic disorders such as cystic fibrosis, PKU, and Marfan.

Compare albinism and vitiligo by contrasting tyrosinase deficiency with autoimmune melanocyte loss, and note acanthosis nigricans hyperkeratosis in diabetics and its link to stomach cancer.

Learn about edema and thrombus, including the distinction between thrombus and ambulance, arteriosclerosis versus atherosclerosis, hypertension forms and risk factors, endocarditis types, angina, and myocardial infarction.

Explore asthma pathology, COPD with emphysema and chronic bronchitis, pneumonia types, lung abscess in alcoholics, and tuberculosis features.

Survey gastrointestinal pathology, including Mallory-Weiss syndrome, achalasia, reflux, peptic ulcers, celiac disease, pancreatitis, and cirrhosis, and their complications such as portal hypertension, ascites, and jaundice.

Investigate nephrolithiasis in genitourinary pathology, including dehydration-associated calcium oxalate or phosphate stones causing colicky ureteral pain. Assess pyelonephritis with E. coli and nephrotic syndrome featuring proteinuria, hypoalbuminemia, edema, and hyperlipidemia.

Explore endocrine pathology focusing on diabetes insipidus, ADH and water reabsorption, central versus nephrogenic forms, and diabetes mellitus types 1 and 2, with the triad of polyuria, polydipsia, and polyphagia.

Explore musculoskeletal pathology with osteomyelitis, a pyogenic infection caused by staph aureus, featuring sequestrum and involucrum, inflammatory signs, and chronic forms such as Gary's sclerosing and chronic recurrent multifocal osteomyelitis.

Define neoplasia and terms such as dysplasia, metaplasia, and anaplasia. Compare carcinoma and sarcoma, describe invasion and metastasis, and note tumor markers and common neoplasms.

Prostate cancer has the highest incidence in males, with prostate-specific antigen detectable. Lung cancer is the leading killer, primarily bronchogenic and smoking-related, with small cell and non-small cell paraneoplastic types.

Identify gastrointestinal cancers such as esophageal and gastric adenocarcinomas, with dysphagia and anorexia, include H. pylori role, histology like signet ring cells, and colorectal cancer risks and screening.

Explore neoplasias of the blood and lymphatic systems, including renal cell carcinoma, Hodgkin and non-Hodgkin lymphomas, Reed-Sternberg cells, Burkitt lymphoma, hairy cell leukemia, pheochromocytoma, and neuroblastoma with N-myc amplification.

Explore the foundational anatomy and development of head and neck, covering neuroanatomy, oral histology, and tooth embryology, from the central nervous system development to branchial arch derivatives.

Review neuroanatomy, histology, and developmental biology by covering the central and peripheral nervous systems, brain lobes and reflexes, oral mucosa and dentin enamel formation, and facial embryology.

Review neuroanatomy, histology, and developmental biology of the nervous system, covering central and peripheral divisions, cerebrum lobes and cortex, brainstem, cerebellum, thalamus and hypothalamus, and key cranial nerves.

Explore the cranial nerves I–XII, their skull exits, and their sensory and motor components. Learn the parasympathetic ganglia—ciliary, pterygopalatine, otic, and submandibular—and their gland targets.

Explain the optic nerve from retinal ganglion cells to the chiasm, note right optic tract injury causing left-eye blindness, and outline pupillary reflex and near response with Edinger-Westphal nucleus.

Covers oculomotor, trochlear, and abducens nerves controlling eye muscles and pupil, ophthalmoplegia, Horner's syndrome, Argyll Robertson pupil, and the optic nerve as the sensory component of the pupillary light reflex.

Explore trigeminal nerve, the largest cranial nerve, arising from trigeminal ganglia in the middle cranial fossa as a mixed nerve with V1, V2, and V3 divisions, including lingual nerve.

Describe the trigeminal system from motor and sensory nuclei to thalamic relays (vpm, vpl) and the mesencephalic nucleus, covering touch, pain, temperature, proprioception, and facial region via trigeminal branches.

Examine CN VII as a mixed nerve with motor, sensory, and secretomotor roles, including lacrimal and salivary glands and chorda tympani taste, plus corneal and jaw reflexes and Bell's palsy.

Identify CN VIII as hearing and balance nerve in temporal bone, innervating cochlea and semicircular canals, and review middle ear ossicles, Eustachian tube, presbycusis, nystagmus, COWS test.

Explore the glossopharyngeal nerve's motor supply to stylopharyngeus, sensory innervation of pharynx and posterior one-third of tongue, gag reflex, carotid body/sinus, and parotid parasympathetic via otic ganglion and petrosal branch.

Explore the vagus nerve (cn x): its medulla-to-abdomen course, anterior trunk, and gautami procedure to reduce gastric acid, plus branches and possible gag reflex loss, dysphagia, and dysphonia.

The 11th nerve, the accessory nerve, when damaged can cause paralysis of the sternocleidomastoid and trapezius, leading to torticollis and shoulder droop.

Hypoglossal nerve CN XII, a pure motor, loops around the occipital artery and passes between external carotid and internal jugular veins, innervating tongue muscles except palatoglossus. LMN toward; UMN away.

Examine the spinal cord in the spinal canal, its 40–45 cm length, filum terminale, conus medullaris, cauda equina, gray and white matter, and major motor and sensory tracts.

Outline the layers of oral mucosa, keratinized versus non-keratinized, from basale to corneum, lamina propria and submucosa. Compare enamel, dentin, cementum, bone, and pulp in mineralization, origin, innervation, and repair.

Trace the development of dentin from odontoblast differentiation and predentin formation to mantle and circum pulpal dentin, including dentinal tubules, interglobular dentin, sclerotic dentine, and incremental lines.

Explore the development of enamel from ameloblast differentiation and enamel matrix secretion to maturation, enamel rods, Tomes' processes, and the role of reduced enamel epithelium and supporting layers.

Describe the development of cementum from dental follicle mesenchyme, its formative deposition on root dentin including lifelong apical cementum formation to counter occlusal wear, and aging-related hypercementosis affecting orthodontic movement.

Learn alveolar bone anatomy, focusing on the alveolar bone proper (cribriform plate) where Sharpey's fibers insert, and the surrounding buccal and lingual cortical plates with cancellous bone.

Explore fetal circulation, including the ductus venosus, foramen ovale, and ductus arteriosus, and review germ layer derivatives as the child transitions after birth.

Explore embryology of the central nervous system, detailing initiation to bell stages from week six to nine, and trace neural plate, neural folds, neural groove, and neural tube formation.

Explore embryology of foregut, midgut, hindgut derivatives and aortic arch derivatives, and trace bulbous conus forming ventricles, left venosus forming coronary sinus, right atria, and the superior vena cava.

Explore the embryology of the face and pharyngeal arches, detailing arch derivatives, palate fusion, tongue development, cleft lip and palate, and the formation of viscerocranium and neurocranium.