1 The atoms in the first period have electrons in 1 energy level. 2  The atoms in the second period have electrons in 2 energy levels. 3  The atoms in the third period have electrons in 3 energy levels. 4  The atoms in the fourth period have electrons in 4 energy levels.
Giant axonal neuropathy is a rare, autosomal recessive neurological disorder that causes disorganization of neurofilaments. Neurofilaments form a structural framework that helps to define the shape and size of neurons and are essential for normal nerve function.iant axonal neuropathy has an autosomal recessive pattern of inheritance. Giant axonal neuropathy results from mutations in the GAN gene, which codes for the protein gigaxonin. This alters the shape of the protein, changing how it interacts with other proteins when organizing the structure of the neuron.
More frequently however, multiple nerves are affected, called polyneuropathy. Some peripheral neuropathies are due to damage to the axons (the long, threadlike portion of the nerve cell), while others are due to damage to the myelin sheath, the fatty protein that coats and insulates the axon. Peripheral neuropathies may also be caused by a combination of both axonal damage and demyelination.