axon hillock


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

ax·on hil·lock

the conic area of origin of the axon from the nerve cell body; it contains parallel arrays of microtubules and is devoid of Nissl substance.
Synonym(s): implantation cone

axon hillock

A conical protuberance that surrounds the axon at its point of departure from the neuronal body, at which point Nissl substance is minimal and accompanied by specialised plasmalemma.

ax·on hil·lock

(ak'son hil'lok)
The conic area of origin of the axon from the nerve cell body; it contains parallel arrays of microtubules and is devoid of Nissl substance.

axon

the process of a nerve cell along which impulses travel away from the cell body. It branches at its termination, forming synapses at other nerve cells or effector organs. Many axons are covered by a myelin sheath formed from the cell membrane of a glial or Schwann cell.

axon hillock
the elevation on the perikaryon from which the axon emerges.
axon reflex
a nerve impulse conducted through nerve pathways limited to the single axon, without the participation of a nerve cell or synapse. Not a true reflex.
axon telodendrion
extensive terminal branches of the axon before terminating on the effector organ.
axon terminals
the axonal structure capable of forming a synapse with another axon.