Where do the axons that enter the cortico-spinal tract originate? (The complete answer should include more than one of Brodmann’s areas.)

From the main motor cortex, Brodmann region 4 premotor areas and the primary somatosensory cortex .

Explanation:

The corticospinal tract originates in many regions of the brain, including

The corticospinal tract allows for voluntary control of motor functions.

30% of the neurons in the corticospinal regions are found in the primary motor cortex. 40% are split up in several regions; the parietal lobe, somatosensory cortex and the cingulate gyrus.

The axon is a tube enclosed in and insulated by the myelin sheath. It serves as a link to impulses for certain neurons that often comprise axon hillocks that are junctions between the axon and the cell body.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.