4. The method of claim 3, wherein the calcium oscillations in the neuronal cells that have been in contact with the molecule are about 70% or higher, about 75% or higher, about 80% or higher, about 85% or higher, about 90% or higher, about 95% or higher, about 96% or higher, about 97% or higher, about 98% or higher, about 99% or higher, about 100% or higher, about 120% or higher, about 140% or higher, about 160% or higher, about 180% or higher, about 200% or higher, about 220% or higher, about 240% or higher, or about 250% or higher compared to the calcium oscillations in the vehicle control cells. E4. The method of embodiment 3, wherein the calcium oscillations in the neuronal cells that are in contact with the molecule are about 70% or higher, about 75% or higher, about 80% or higher, about 85% or higher, about 90% or higher, about 95% or higher, about 96% or higher, about 97% or higher, about 98% or higher, about 99% or higher, about 100% or higher, about 120% or higher, about 140% or higher, about 160% or higher, about 180% or higher, about 200% or higher, sex camera about 220% or higher, about 240% or higher, or about 250% or higher compared to the calcium oscillations in the vehicle control cells.

E6. The method of embodiment 5, wherein the calcium oscillations in the neuronal cells that have been in contact with the molecule are about 70% or higher, free cam shows about 75% or higher, about 80% or higher, about 85% or higher, about 90% or higher, about 95% or higher, about 96% or higher, about 97% or higher, about 98% or higher, about 99% or higher, about 100% or higher, about 120% or higher, about 140% or higher, about 160% or higher, about 180% or higher, about 200% or higher, about 220% or higher, about 240% or higher, or about 250% or higher compared to the calcium oscillations in the vehicle control cells. E25. The method of embodiment 23, wherein the antisense oligonucleotide targets an mRNA of the target protein. E31. The method of any one of embodiments 23 to 30, wherein the antisense oligonucleotide is complementary to an mRNA or cum on teen ass a pre-mRNA of the target gene. 9. A method of determining in vivo acute neurotoxicity of a molecule comprising a polynucleotide, the method comprising calculating a sequence score, wherein the sequence score is calculated by formula (I): (number of C nucleotides or analogs thereof in the polynucleotide-number of G nucleotides or analogs thereof in the polynucleotide)/total nucleotide length (number) of the polynucleotide (I)

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> 8. The method of claim 1, wherein the molecule comprises a polynucleotide, the method further comprising calculating a sequence score, wherein the sequence score is calculated by formula (I): (number of C nucleotides or analogs thereof in the polynucleotide-number of G nucleotides or analogs thereof in the polynucleotide)/total nucleotide length (number) of the polynucleotide (I). 14. The method of claim 1, further comprising measuring a behavioral test score of the molecule. E27. The method of any one of embodiments 25 to 26, wherein the mRNA is expressed in a cell. E23. The method of any one of embodiments 16 to 22, wherein the polynucleotide is an antisense oligonucleotide (i.e., oligomer) of about 10 to about 50 nucleotides in length. E30. The method of any one of embodiments 23 to 29, wherein the antisense oligonucleotide modulates protein expression encoded by the target protein in the culture of the neuronal cells. E5. A method of selecting or identifying a molecule having tolerable in vivo acute neurotoxicity comprising measuring calcium oscillations in vitro in neuronal cells which are in contact with the molecule, wherein the neuronal cells in contact with the molecule exhibit calcium oscillations at a level comparable to or higher than that of vehicle control cells

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> E8. The method of any one of embodiments 1 to 7, wherein the molecule comprises a small molecule, a polynucleotide, a protein, a peptide, or any combination thereof. E33. The method of any one of embodiments 1 to 32, further comprising measuring an in vivo tolerability of the molecule. E14. The method of one of embodiments 1 to 13, further comprising administering the molecule to a subject in need of treatment of a disease or condition. E15. The method of embodiment 14, wherein the disease or condition is selected from the group consisting of a viral infection, a neurological disorder (e.g., Alzheimer’s disease, progressive supranuclear palsy, Down syndrome, dementia pugilistica (chronic traumatic encephalopathy and other traumatic brain injury), frontotemporal dementia with parkinsonism linked to chromosome 17 (FTDP-17), Lytico-Bodig disease (Parkinson-dementia complex of Guam), Tangle-predominant dementia, ganglioglioma, gangliocytoma, meningioangiomatosis, subacute sclerosing panencephalitis, lead encephalopathy, Hemimegalencephaly, tuberous sclerosis, Hallervorden-Spatz disease, Pick’s disease, corticobasal ganglionic degeneration, argyrophilic grain disease, corticobasal degeneration, lipofuscinosis, frontotemporal dementia, supranuclear palsy, and frontotemporal lobar degeneration, a disease of brain network dysfunction (e.g., all forms of epilepsy and depression), a spinal cord disorder, a peripheral neuropathy, a cranial nerve disorder (e.g., Trigeminal neuralgia), an autonomic nervous system disorder (e.g., dysautonomia or multiple system atrophy), a movement disorder of a central and peripheral nervous system (e.g., Parkinson’s disease, essential tremor, amyotrophic lateral sclerosis, Tourette’s Syndrome, multiple sclerosis or various types of peripheral neuropathy), a sleep disorder (e.g., Narcolepsy), migraine or other types of headache (e.g., cluster headache and tension headache), lower back and neck pain, central neuropathy, a neuropsychiatric illness, attention deficit hyperactivity disorder, autism, Huntington’s disease, Rett Syndrome, Angelman Syndrome, organic psychosis, an infection of the brain or spinal cord (including meningitis), or a prion disease), anemia, cancer, leukemia, an inflammatory condition or an autoimmune disease (e.g. arthritis, psoriasis, lupus erythematosus, multiple sclerosis), a bacterial infection, frontotemporal dementia-tau (FTD-tau), frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17), corticobasal degeneration (CBD), traumatic brain injury, chronic traumatic encephalopathy, HIV associated neurocognitive disorders, Argyrophilic grain disease, Down syndrome-Alzheimer’s disease, Amnestic mild cognitive impairment-Alzheimer’s disease, Parkinson’s disease dementia, Hallervorden-Spatz disease (Pantothenate kinase-associated neurodegeneration), Niemann Pick disease type C, Myotonic dystrophy, Amyotrophic lateral sclerosis, Hemimegalencephaly, Tuberous sclerosis complex, Focal cortical dysplasia type 2b, Ganglion cell tumors, Dravet Syndrome (severe myoclonic epilepsy of infancy), Temporal lobe epilepsy, Ohtahara syndrome (early infantile epileptic encephalopathy with suppression bursts), Lafora body disease, Generalized epilepsy with febrile seizures, Infantile spasms (West syndrome), Lennox Gastaut syndrome, Angelman Syndrome, Rett Syndrome, Landau Kleffner syndrome, focal seizures, simple focal seizures (no loss of consciousness), focal dyscognitive seizures (impairment of consciousness), focal seizure evolving to generalised tonic-clonic (GTC) convulsions, generalised seizures (convulsive or non-convulsive with bilateral discharges involving subcortical structures), absence seizures, myoclonic seizures, clonic seizures, tonic seizures, tonic-clonic seizures and atonic seizures, an autistic disorder, an autism spectrum disorder, an Asperger’s disorder, a pervasive developmental disorder, and any combination thereof

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