Neuron Anatomy and Dendrites

Neuron Anatomy

Dendrites

• Definition: Branching, treelike fibers extending from the neuron.
• Function: Dendrites are the receiving parts of the neuron, which collect information from other cells and send it to the soma (cell body).
• Connection to Cell Body: Dendrites convey incoming messages toward the cell body as graded potentials (short-distance signals). The sum total of dendritic inputs determines whether the neuron will fire an action potential.

Characteristics of Dendrites

• Many brain areas have specialized finer dendrites that enhance their ability to collect information effectively.
• Dendrites possess dendritic spines:
  • Definition: Appendages with bulbous or spiky ends.
  • Significance: Dendritic spines represent a specific site for synaptic contact. They are characteristic of some but not all dendrites, indicating variability in dendritic structure and function across different neuron types.