ventral primary ramus of spinal nerve
(Science: anatomy, nerve) The larger, anterolaterally-directed major terminal branch (with the dorsal primary ramus) of all 31 pairs of mixed spinal nerves, formed at the intervertebral foramen. Most ventral primary rami, especially those involved in the innervation of the limbs, participate in the formation of the major nerve plexuses (cervical, brachial, and lumbosacral) and lose their identities. Most in the thoracic region, however, remain separate from adjacent rami to become the intercostal and subcostal nerves. Ventral primary rami provide innervation to the anterolateral body wall and trunk. Nomina Anatomica lists ventral primary rami as rami ventrales for each group of spinal nerves: 1) cervical (nervorum cervicalium ), 2) thoracic (nervorum thoracicorum ), 3) lumbar (nervorum lumbalium ), 4) sacral (nervorum sacralium )m, and 5) coccygeal (nervi coccygei ).
Synonym: ramus ventralis nervi spinalis, anterior primary division.
Dictionary > Ventral primary ramus of spinal nerve
You will also like...

Sigmund Freud and Carl Gustav Jung
In this tutorial, the works of Carl Gustav Jung and Sigmund Freud are described. Both of them actively pursued the way h..

Independent Assortment and Crossing Over
This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..

Plant Biology
Plantlife can be studied at a variety of levels, from the molecular, genetic and biochemical level through organelles, c..

Mendel’s Law & Mendelian Genetics
One of Mendel’s law of inheritance is the “law of dominance”. Read this tutorial to know more about this form of i..

Chromosome Mutations
Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..

Polyploidy
Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..