embryo: central nervous system

Central Nervous System

• consist of the brain and spinal cord

• derived from the neural tube

• the body’s decision and communicating center

Cerebrum/Cortex

the largest part of the human brain, associated with higher brain function such as thought and action

Frontal Lobe

Parietal Lobe

Occipital Lobe

Temporal Lobe

4 sections of the cerebrum

Frontal Lobe

associated with reasoning, planning, parts of speech, movement, emotions, and problem solving

Parietal Lobe

associated with movement, orientation, recognition, perception of stimuli

Occipital Lobe

associated with visual processing

Temporal Lobe

associated with perception and recognition of auditory stimuli, memory, and speech

Posterior Neuropore

caudal end remains open for sometime and is called __

Anterior Neuropore

rostral end remains open for sometimes and is called __

Lumen

Wall

parts of the neural tube

Lumen

neural canal

Germinal Layer/Ventricular Zone

Mantle Layer/Intermediate Zone

Marginal Layer

3 layers of wall

Germinal Layer/Ventricular Zone

innermost layer that lies adjacent to the neural canal

consists of mitotically active neuroepithelia cells

Pseudostratified Columnar Epithelium

-neuroepithelial cells form a __ that lines the neural canal

Neuroblast or Spongioblast

daughter neuroepithelial cells will become __

Neuroblast

immature neuro

Spongioblast

immature neuroglial cells

Mantle Layer/Intermediate Zone

• middle layer of the wall

• contains cell bodies of neuroblast and spongioblast

Marginal Layer

• outermost layer of the wall

• contains axons of neuroblast

Telencephalon

Diencephalon

Mesencephalon

Metencephalon

Myelencephalon

5 regions of the brain

Cerebral Cortex (dorsal portion)

Rhinencephalon (ventral portion)

left and right cerebral hemispheres

Olfactory Bulb

Olfactory Tract

Pyriform Lobe

2 parts of rhinencephalon