Spinal nerve C1 is called the suboccipital nerve which provides motor innervation to muscles at the base of the skull.

This groove represents the superior vertebral notch, and serves for the transmission of the vertebral artery, which, after ascending through the foramen in the transverse process, winds around the lateral mass in a direction backward and medially ; it also transmits the suboccipital nerve ( first spinal nerve ).

The suboccipital nerve also innervates rectus capitis posterior minor.

It is innervated by the suboccipital nerve, the dorsal ramus of the first spinal nerve.

The first cervical or suboccipital nerve lies between the artery and the posterior arch of the atlas.

It is believed that proprioception may be the primary role of the inferior oblique ( and indeed the other suboccipital muscles ) allowing accurate positioning of the head on the neck.

The second subtype, posterolateral neck dissection, refers to the removal of the suboccipital lymph nodes, retroauricular lymph nodes, levels II-IV, and level V. This procedure is used most often to remove nodal disease from cutaneous melanoma of the posterior scalp and neck.

This part of the artery is covered by the Semispinalis capitis and is contained in the suboccipital triangle — a triangular space bounded by the Rectus capitis posterior major, the Obliquus superior, and the Obliquus inferior.

At the C1 level the vertebral arteries travel across the posterior arch of the atlas through the suboccipital triangle before entering the foramen magnum.

This is a common symptom and the cause usually is pressure on the nerve leading to the affected hand.

Orthodontic work is possible because teeth are held firmly but not rigidly, by a system of peridontal membrane with an involved nerve network, to the bone in the jaw ; ;

Or you could wish your daddy would really do it -- kill Gratt Shafer like he said when you all the time, all along, could feel the nerve draining out of him like air out of a punctured tire when you are on a muddy road alone and it is raining and at night.

It is possible that Johnston's duel in 1837 had caused nerve damage or numbness to his right leg and that he did not feel the wound to his leg as a result.

An axon ( also known as a nerve fiber ) is a long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses away from the neuron's cell body.

Unlike ethanol, methanol is extremely toxic: As little as 10 ml can cause permanent blindness by destruction of the optic nerve and 30 ml ( one fluid ounce ) is potentially fatal.

The exact mechanism of action of paracetamol / acetaminophen is uncertain, but it appears to be acting centrally rather than peripherally ( in the brain rather than in nerve endings ).

Because it is innervated by preganglionic nerve fibers, the adrenal medulla can be considered as a specialized sympathetic ganglion.

Most of the space in the brain is taken up by axons, which are often bundled together in what are called nerve fiber tracts.

Myelin is white, so parts of the brain filled exclusively with nerve fibers appear as light-colored white matter, in contrast to the darker-colored grey matter that marks areas with high densities of neuron cell bodies.

Except for a few primitive types such as sponges ( which have no nervous system ) and jellyfish ( which have a nervous system consisting of a diffuse nerve net ), all living animals are bilaterians, meaning animals with a bilaterally symmetric body shape ( that is, left and right sides that are approximate mirror images of each other ).

The fundamental bilateral body form is a tube with a hollow gut cavity running from the mouth to the anus, and a nerve cord with an enlargement ( a ganglion ) for each body segment, with an especially large ganglion at the front, called the brain.

* Though not strictly speaking exposed, a bird's beak is primarily bone covered in a layer of keratin over a vascular layer containing blood vessels and nerve endings.

Sensation in the breast is provided by the peripheral nervous system innervation, by means of the front ( anterior ) and side ( lateral ) cutaneous branches of the fourth -, the fifth -, and the sixth intercostal nerves, while the T-4 nerve ( Thoracic spinal nerve 4 ), which innervates the dermatomic area, supplies sensation to the nipple-areola complex.

They are sensitive to the touch as they have many nerve endings ; and it is common to press or massage them with hands or orally before or during sexual activity.

In all craniates except for hagfish, the dorsal hollow nerve cord is surrounded with cartilaginous or bony vertebrae and the notochord is generally reduced ; hence, hagfish are not universally regarded as vertebrates, though recent DNA comparisons suggest that they are in fact vertebrates.

The symptoms of CJD are caused by the progressive death of the brain's nerve cells, which is associated with the build-up of abnormal prion proteins forming amyloids.

When brain tissue from a CJD patient is examined under a microscope, many tiny holes can be seen where whole areas of nerve cells have died.

In special cases, where only one eye deviates and the other does not, this often indicates a lesion ( or damage ) of the medial longitudinal fasciculus ( MLF ) which is a brainstem nerve tract.

Pupil reaction to light is important because it shows an intact retina, and cranial nerve number 2 ( CN II ); if pupils are reactive to light, then that also indicates that the cranial nerve number 3 ( CN III ) ( or at least its parasympathetic fibers ) are intact.

Chordates, members of the phylum Chordata, are deuterostome animals possessing a notochord, a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail for at least some period of their life cycles.

All nociceptors are free nerve endings that have their cell bodies outside the spinal column in the dorsal root ganglia and are named according to their appearance at their sensory ends.

Impulses are then transmitted to nerve fibers that terminate in lamina V, also in the dorsal horn, synapsing with neurons that join fibers from the fast pathway, crossing to the opposite side via the anterior white commissure, and traveling upwards through the anterolateral pathway.

The authors proposed that both thin ( pain ) and large diameter ( touch, pressure, vibration ) nerve fibers carry information from the site of injury to two destinations in the dorsal horn of the spinal cord, and that the more large fiber activity relative to thin fiber activity at the inhibitory cell, the less pain is felt.

These are the substantia nigra ( from the Latin black substance )-Pars Compacta part, the locus coeruleus ( blue spot ), the dorsal motor nucleus of the vagus nerve ( cranial nerve X ), and the median raphe nucleus of the pons.

The nervous system of prawns comprises a dorsal brain, and a ventral nerve cord, connected by two commissures around the oesophagus.

** Spinal nerves which are distal to the dorsal and ventral spinal nerve roots

It soon divides into two terminal branches: the perineal nerve, and the dorsal nerve of the penis ( in males ) or the dorsal nerve of the clitoris ( in females ).

Preganglionic parasympathetic neurons are in the medulla oblongata ( forming visceral motor nuclei: the dorsal motor nucleus of the vagus nerve ( dmnX ), the nucleus ambiguus, and salivatory nuclei ) and in the sacral spinal cord.

The vagus nerve, named from the Latin word vagus means literally " Wandering ", since the nerve controls such a broad range of target tissues, has PSN that originate in the dorsal nucleus of the vagus nerve and the nucleus ambiguus in the CNS.

** The dorsal nucleus of vagus nerve and the inferior salivatory nucleus, both of which form the general visceral efferent fibers.

Axons from the facial nerve loop around the abducens nucleus, creating a slight bulge ( the facial colliculus ) that is visible on the dorsal surface of the floor of the fourth ventricle.

The central anatomy of the sixth nerve predicts ( correctly ) that infarcts affecting the dorsal pons at the level of the abducens nucleus can also affect the facial nerve, producing an ipsilateral facial palsy together with a lateral rectus palsy.

The radial nerve and its branches provide motor innervation to the dorsal arm muscles ( the triceps brachii and the anconeus ) and the extrinsic extensors of the wrists and hands ; it also provides cutaneous sensory innervation to most of the back of the hand.

All the labeled muscles ( that is, all the visible muscles except the ones one the dorsal hand and one at top left ) are innervated by the radial nerve, and represent all muscles innervated by the radial nerve except for the supinator.