axon hillock
Tapering region between a neuron\'s cell body and its axon. This region is responsible for summating the graded inputs from the dendrites, and producing action potentials if the threshold is exceeded.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • Axon hillock — Hillock redirects here. A hillock is also a small hill. The axon hillock is the anatomical part of a neuron that connects the cell body (the soma) to the axon. It is described as the location where the summation of inhibitory postsynaptic… …   Wikipedia

  • axon hillock — n the prominence on a nerve cell body from which an axon arises * * * the conical expansion of an axon at its point of attachment to the body of the nerve cell …   Medical dictionary

  • axon hillock — noun : the prominence on a nerve cell body from which an axon arises …   Useful english dictionary

  • Axon — For other uses, see Axon (disambiguation). Structure of a typical neuron Axon …   Wikipedia

  • hillock — In anatomy, any small elevation or prominence. axon h. the conical area of origin of the axon from the nerve cell body; it contains parallel arrays of microtubules and is devoid of Nissl substance …   Medical dictionary

  • implantation cone — axon hillock …   Medical dictionary

  • Action potential — In physiology, an action potential is a short lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory. Action potentials occur in several types of animal cells, called… …   Wikipedia

  • Neuron — This article is about cells in the nervous system. For other uses, see Neuron (disambiguation). Brain cell redirects here. For other uses, see Glial cell. Neuron: Nerve Cell …   Wikipedia

  • nervous system — Anat., Zool. 1. the system of nerves and nerve centers in an animal or human, including the brain, spinal cord, nerves, and ganglia. 2. a particular part of this system. Cf. autonomic nervous system, central nervous system, peripheral nervous… …   Universalium

  • Chromatolysis — is the dissolution of the Nissl bodies in the cell body of a neuron. It is an induced response of the cell usually triggered by axotomy (severing or damaging of the axon), ischemia, toxicity to the cell, cell exhaustion, virus infections, and… …   Wikipedia

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