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- Ideational apraxiaNeurological loss of ability to plan object use
- Ii antigen systemHuman blood group system
- Ileocecal valveSphincter muscle valve
- Ileocolic arteryThe ileocolic artery is the lowest branch arising from the concavity of the superior mesen
- Iliac crestTop border of the hip
- Iliac fossaThe iliac fossa is a large, smooth, concave surface on the internal surface of the ilium (
- Iliacus muscleThe iliacus is a flat, triangular muscle which fills the iliac fossa. It forms the lateral
- Iliohypogastric nerveNerve in the human torso
- Iliolumbar arteryThe iliolumbar artery is the first branch of the posterior trunk of the internal iliac art
- Iliolumbar ligamentLigament of the pelvis
- IliopsoasJoined psoas and iliacus muscles of the hip and thigh
- Ilium (bone)Uppermost and largest part of the coxal bone
- Illegal drug trade in the United StatesThe US federal government is an opponent of the illegal drug trade; however, state laws va
- Illusory palinopsiaIllusory palinopsia is a subtype of palinopsia, a visual disturbance defined as the persis
- Imagined speechPsychological phenomenon
- Imam Hussain Blood Donation CampaignCampaign for blood donation
- Immune complexMolecule formed binding antigens to antibodies
- Immune thrombocytopenic purpuraMedical condition with rash and bleeding risk
- Immunogenic cell deathAny type of cell death eliciting an immune response
- Immunoglobulin MOne of several isotypes of antibody
- ImmunohistochemistryCommon application of immunostaining
- Immunological synapseInterface between lymphocyte and target cell
- Implantable cardioverter-defibrillatorMedical device
- Implantable loop recorderDevice used for cardiac monitoring
- In situ hybridizationIn situ hybridization (ISH) is a type of hybridization that uses a labeled complementary D
- In vivo magnetic resonance spectroscopyIn vivo magnetic resonance spectroscopy (MRS) is a specialized technique associated with m
- INAH 3Third interstitial nucleus of the anterior hypothalamus
- Inappropriate sinus tachycardiaSyndrome where the sinus heart rate is inexplicably faster than expected
- Indole testThe indole test is a biochemical test performed on bacterial species to determine the abil
- Infant swimmingInfant swimming is the phenomenon of human babies and toddlers reflexively moving themselv
- Infantile epileptic spasms syndromeMedical condition
- Inferior alveolar arteryArtery found in the head
- Inferior alveolar nerveBranch of the mandibular nerve
- Inferior cerebellar peduncleThe inferior cerebellar peduncle is formed by fibers of the restiform body that join with
- Inferior colliculusMidbrain structure involved in the auditory pathway
- Inferior epigastric arteryBlood vessel
- Inferior frontal gyrusPart of the brain's prefrontal cortex
- Inferior gluteal arteryBlood vessel
- Inferior gluteal nerveThe inferior gluteal nerve is the main motor neuron that innervates the gluteus maximus mu
- Inferior gluteal veinsThe inferior gluteal veins are venae comitantes of the inferior gluteal artery. They comme
- Inferior hypogastric plexusAutonomic nerve plexus in the pelvic cavity
- Inferior mesenteric arteryBranch of the abdominal aorta supplying part of the large intestine
- Inferior mesenteric veinIn human anatomy, the inferior mesenteric vein (IMV) is a blood vessel that drains blood f
- Inferior nasal conchaFacial bone
- Inferior oblique musclePart of the eye
- Inferior ophthalmic veinVein of the orbit around the eye
- Inferior orbital fissureThe inferior orbital fissure is a gap between the greater wing of sphenoid bone, and the m
- Inferior pancreaticoduodenal arteryArtery of the abdomen
- Inferior parietal lobulePortion of the parietal lobe of the brain
- Inferior pharyngeal constrictor muscleSkeletal muscle of the pharynx
- Inferior rectus muscleMuscle of the eye
- Inferior suprarenal arteryArtery that supplies the adrenal gland
- Inferior thyroid arteryArtery of the neck
- Inferior thyroid veinsThe inferior thyroid veins appear two, frequently three or four, in number, and arise in t
- Inferior tympanic arteryThe inferior tympanic artery is a small branch of the ascending pharyngeal artery which pa
- Inferior ulnar collateral arteryThe inferior ulnar collateral artery (anastomotica magna artery) is an artery in the arm.
- Inferior vena cavaOne of two veinous trunks bringing deoxygenated blood back to the heart
- Inferior vesical arteryThe inferior vesical artery (or inferior vesical artery) is an artery of the pelvis which
- Infrahyoid musclesGroup of muscles
- Infralimbic cortexThe infralimbic cortex (IL) is a cortical region in the ventromedial prefrontal cortex whi
- Infraorbital foramenIn human anatomy, the infraorbital foramen is one of two small holes in the skull's upper
- Infraorbital nerveBranch of the maxillary nerve supplying the face
- Infraspinatus muscleMain external rotator of the shoulder
- Infraspinous fossaThe infraspinous fossa (infraspinatus fossa or infraspinatous fossa) of the scapula is muc
- Infratemporal fossaThe infratemporal fossa is an irregularly shaped cavity that is a part of the skull. It is
- Infratemporal spaceThe infratemporal space (also termed the infra-temporal space or the infra-temporal portio
- Infratrochlear nerveBranch of the nasociliary nerve
- Ingression (biology)Ingression is one of the many changes in the location or relative position of cells that t
- Inguinal canalHuman abdominal anatomy
- Inguinal lymph nodesLymph nodes in the human groin
- InhalantChemical, often household, breathed in to cause intoxication
- InhalationFlow of the respiratory current into an organism
- Inhibitory postsynaptic potentialElectrical signal inhibiting a neuron from firing
- Inner cell massEarly embryonic mass that gives rise to the fetus
- Inner earInnermost part of the vertebrate ear
- Inner mitochondrial membraneCell structure
- Inner plexiform layerThe inner plexiform layer is an area of the retina that is made up of a dense reticulum of
- InnexinInnexins are transmembrane proteins that form gap junctions in invertebrates. Gap junction
- Insect cognitionMental capacity of insects
- Instinctive drowning responseInstinctive reaction that occurs in humans when close to drowning
- Institute of Mental Health and NeurosciencesInstitute of Mental Health and Neurosciences (IMHANS) is an Indian autonomous institute in
- Instrumentation amplifierAn instrumentation amplifier (sometimes shorthanded as in-amp or InAmp) is a type of diffe
- Insular cortexPortion of the mammalian cerebral cortex
- Insulin-like growth factorThe insulin-like growth factors (IGFs) are proteins with high sequence similarity to insul
- Insulin-like growth factor 1 receptorThe insulin-like growth factor 1 (IGF-1) receptor is a protein found on the surface of hum
- Interactions between the emotional and executive brain systemsThe neurocircuitry that underlies executive function processes and emotional and motivatio
- Interatrial septumWall of tissue separating atria of human heart
- Intercalated cells of the amygdalaThe Intercalated cells of the amygdala (ITC or ICCs) are GABAergic neurons situated betwee
- Intercarpal jointsJoints of the carpal bones of the wrist
- Intercellular adhesion moleculeIn molecular biology, intercellular adhesion molecules (ICAMs) and vascular cell adhesion
- Intercostal arteriesArteries supplying the space between the ribs
- Intercostal spaceAnatomic space between two ribs
- Interdigital webbingInterdigital webbing refers to the presence of skin membranes. Normally, in mammals, webbi
- Interference theoryTheory regarding human memory
- Interleukin 21Interleukin 21 (IL-21) is a protein that in humans is encoded by the IL21 gene.
- Intermediate mesodermLayer of cells in mammalian embryos
- Intermediate-term memoryStage of memory in brains
- Internal anal sphincterRing of smooth muscle that surrounds part of the anal canal
- Internal arcuate fibersIn neuroanatomy, the internal arcuate fibers or internal arcuate tract are the axons of se
- Internal auditory meatusThe internal auditory meatus (also meatus acusticus internus, internal acoustic meatus, in
- Internal capsuleWhite matter structure of the brain
- Internal carotid plexusThe internal carotid plexus is a nerve plexus situated upon the lateral side of the intern
- Internal cerebral veinsThe internal cerebral veins are two veins included in the group of deep cerebral veins tha
- Internal environmentBiological term for the interstitial fluid of multicellular organisms
- Internal globus pallidusBrain component in the basal ganglia
- Internal iliac arteryMain artery of the pelvis
- Internal iliac lymph nodesThe internal iliac lymph nodes (or hypogastric) surround the internal iliac artery and its
- Internal iliac veinLarge blood vessel of the pelvis
- Internal intercostal musclesThe internal intercostal muscles (intercostales interni) are a group of skeletal muscles l
- Internal jugular veinBlood vessel that drains the head
- Internal obturator muscleOne of six small hip muscles in the lateral rotator group
- Internal occipital protuberanceAlong the internal surface of the occipital bone, at the point of intersection of the four
- Internal thoracic arteryArtery of the thorax
- Internal thoracic veinLarge blood vessel draining breasts and the chest wall
- Internal urethral orificeThe internal urethral orifice is the opening of the urinary bladder into the urethra.
- Internal urethral sphincterUrethral sphincter muscle which constricts the internal urethral orifice
- Internal vertebral venous plexusesBlood vessel network
- International Brain BeeThe International Brain Bee (IBB) is a neuroscience competition for teenagers. The IBB was
- International Prognostic IndexOncology tool to predict lymphoma prognosis
- International Society of Blood TransfusionScientific society promoting study of and awareness about blood transfusion
- InterneuronNeurons that are not motor or sensory
- Internuclear ophthalmoplegiaInternuclear ophthalmoplegia (INO) is a disorder of conjugate lateral gaze in which the af
- Interpeduncular fossaBrain segment
- Interpersonal neurobiologyInterdisciplinary framework associated with human development and functioning
- Interphalangeal joints of the handHinge joints between finger phalanges
- Interposed nucleusThe interposed nucleus is the combined paired globose and emboliform nuclei, (deep cerebel
- InterProDatabase of protein families, domains and functional sites
- Interstitial cell of CajalInterstitial cells found in the gastrointestinal tract
- InterstitiumFluid-filled space in organs
- Interventricular foramina (neuroanatomy)Structures within the human brain
- Interventricular septumWall of tissue separating ventricles of human heart
- Intervertebral foramenForamen between spinal vertebrae
- Intestinal epitheliumSingle-cell layer lining the intestines
- Intestinal mucosal barrierThe intestinal mucosal barrier, also referred to as intestinal barrier, refers to the prop
- Intestinal villusFinger-like projection of the small intestine
- Intraepithelial lymphocyteFound in the epithelial layer of mucosal linings
- Intrafusal muscle fiberIntrafusal muscle fibers are skeletal muscle fibers that serve as specialized sensory orga
- Intraglomerular mesangial cellIntraglomerular mesangial cells are mesangial cells located among the glomerular capillari
- Intrahepatic bile ductsIntrahepatic bile ducts compose the outflow system of exocrine bile product from the liver
- Intramembranous ossificationIntramembranous ossification is one of the two essential processes during fetal developmen
- Intraoperative blood salvageIntraoperative blood salvage (IOS), also known as cell salvage, is a specific type of auto
- Intraosseous infusionIntraosseous infusion (IO) is the process of injecting medication, fluids, or blood produc
- Intravascular hemolysisIntravascular hemolysis describes hemolysis that happens mainly inside the vasculature. As
- Intraventricular blockMedical condition
- Intrinsic factorGlycoprotein produced in the stomach which binds to vitamin B12
- Intrinsically photosensitive retinal ganglion cellType of neuron in the retina of the mammalian eye
- IntubationMedical intervention
- IntuitionAbility to acquire knowledge without conscious reasoning
- Intussusceptive angiogenesisIntussusceptive angiogenesis also known as splitting angiogenesis, is a type of angiogenes
- InvasinInvasins are a class of bacterial proteins associated with the penetration of pathogens in
- Inward-rectifier potassium channelGroup of transmembrane proteins that passively transport potassium ions
- Ion channelPore-forming membrane protein
- Ion transporterTransmembrane protein that moves ions across a biological membrane
- Ira BlackAmerican physician and neuroscientist (1941–2006)
- Iris sphincter muscleMuscle in the eye which constricts the pupil
- Iron supplementIron formulation used to prevent or treat iron deficiency anemia
- Iron-responsive element-binding proteinThe iron-responsive element-binding proteins, also known as IRE-BP, IRBP, IRP and IFR , bi
- Irregular boneThe irregular bones are bones which, from their peculiar form, cannot be grouped as long,
- Irregular sleep–wake rhythm disorderSleep disorder
- Ischemic preconditioningExperimental medical technique
- Ischioanal fossaThe ischioanal fossa (formerly called ischiorectal fossa) is the fat-filled wedge-shaped s
- IschiumLower and back region of the hip bone
- Islands of CallejaGroup of neural granule cells
- Isolated brainBrain kept alive in vitro outside of a body
- Isolated organ perfusion techniqueIsolated organ perfusion technique is employed to precipitate an organ's perfusion and cir
- IsozymeIn biochemistry, isozymes (also known as isoenzymes or more generally as multiple forms of
- Isthmic organizerThe isthmic organizer, or isthmus organizer, also known as the midbrain−hindbrain boundary
- ITGAEIntegrin, alpha E (ITGAE) also known as CD103 (cluster of differentiation 103) is an integ
