Human brain development timeline - AbsoluteAstronomy.com

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

: Homo Sapiens
Family: Hominidae

Hominidae

The Hominidae or include them .), as the term is used here, form a taxonomic family, including four extant genera: chimpanzees , gorillas , humans , and orangutans ....

Order

Order (biology)

In scientific classification used in biology, the order is# a taxonomic rank used in the classification of organisms. Other well-known ranks are life, domain, kingdom, phylum, class, family, genus, and species, with order fitting in between class and family...

: Primates
Gestation

Gestation

Gestation is the carrying of an embryo or fetus inside a female viviparous animal. Mammals during pregnancy can have one or more gestations at the same time ....

: 270 days

Day	Event	Reference
33	posterior commissure Posterior commissure The posterior commissure is a rounded band of white fibers crossing the middle line on the dorsal aspect of the upper end of the cerebral aqueduct. It is important in the bilateral pupillary light reflex.... appears	Ashwell et al. (1996)
33	medial forebrain bundle Medial forebrain bundle The Medial forebrain bundle , is a complex bundle of axons coming from the basal olfactory regions, the periamygdaloid region, and the septal nuclei.-Anatomy:... appears	Ashwell et al. (1996)
44	mammillothalamic tract Mammillothalamic tract The mammillothalamic fasciculus arises from cells in both the medial and lateral nuclei of the mammillary body and by fibers that are directly continued from the fornix.The Mammillothalamic fasciculus then connects the mammillary body to the dorsal tegmental nuclei, the ventral... appears	Ashwell et al. (1996)
44	stria medullaris thalami appears	Ashwell et al. (1996)
51	axon Axon An axon is a long, slender projection of a nerve cell, or neuron, that conducts electrical impulses away from the neuron's cell body or soma.... s in optic stalk Optic stalk The optic vesicles project toward the sides of the head, and the peripheral part of each expands to form a hollow bulb, while the proximal part remains narrow and constitutes the optic stalk....	Dunlop et al. (1997)
56	external capsule External capsule The external capsule is a series of white matter fiber tracts in the brain. These fibers run between the most lateral segment of the lentiform nucleus and the claustrum.... appears	Ashwell et al. (1996)
56	stria terminalis appears	Ashwell et al. (1996)
60	optic axons invade visual centers	Dunlop et al. (1997)
63	internal capsule Internal capsule The internal capsule is an area of white matter in the brain that separates the caudate nucleus and the thalamus from the lenticular nucleus. The internal capsule contains both ascending and descending axons.... appears	Ashwell et al. (1996)
63	fornix Fornix The fornix is a C-shaped bundle of fibers in the brain, and carries signals from the hippocampus to the hypothalamus.-Structure:... appears	Ashwell et al. (1996)
70	anterior commisure appears	Ashwell et al. (1996)
77	hippocampal commissure appears	Ashwell et al. (1996)
87.5	corpus callosum Corpus callosum The corpus callosum , also known as the colossal commissure, is a wide, flat bundle of neural fibers beneath the cortex in the eutherian brain at the longitudinal fissure. It connects the left and right cerebral hemispheres and facilitates interhemispheric communication... appears	Ashwell et al. (1996)
157.5	eye opening	Kurjak et al. (2004); Campbell et al. (2005)
175	ipsi/contra segregation in LGN and SC	Robinson and Dreher (1990)

External links

Translating Time — a website providing translation of brain developmental times among different species

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