Making developmental sense of the senses, their origin and function.

Area of Science:

• Developmental biology
• Neuroscience
• Sensory biology

Background:

• The primary senses (touch, taste, sight, smell, hearing) are vital for animal interaction with their environment.
• Vertebrate sensory organs and pathways, excluding eyes, originate from neural crest and cranial placodes stem cells.

Purpose of the Study:

• To explore the historical and cultural perspectives of senses.
• To discuss senses as biological faculties.
• To detail the embryonic origins of neural crest and cranial placodes and their roles in sensory system development.

Main Methods:

• Review of historical and cultural contexts of senses.
• Embryonic origin tracing of neural crest and cranial placodes from the neural plate border.
• Description of major chemical (olfactory, gustatory) and mechanical (vestibulo-auditory, somatosensory) senses.

Main Results:

• Neural crest and cranial placodes are transient stem cell populations.
• These populations arise from the ectodermal germ layer's neural plate border during embryonic development.
• Developmental interactions between neural crest and cranial placodes shape sensory structures and functions.

Conclusions:

• The neural crest and cranial placodes are fundamental to the development of major vertebrate sensory systems.
• Understanding these developmental origins provides insight into the biological basis of senses.
• Emphasizes the intricate interplay between embryonic cell populations and sensory faculty formation.