The Optic Nerve - Human Anatomy ~ Amazing News

The optic nerve fibers distal to the lamina cribrosa are myelinated, while those preceding the At the periphery, the transverse septae attach the pia mater to the posterior aspect of the lamina cribrosa. Each is made up from temporal fibers arising from the retina of the ipsilateral eye, as well as nasal...Nerve fibers from the medial aspect of each eye _. A) go to the superior colliculus only B) pass posteriorly without crossing over at the chiasma C) The first "way station" in the visual pathway from the eye, after there has been partial crossover of the fibers in the optic chiasma, is the _.The eyes are paired, sensory organs that enable vision. Anatomically, the outer portion of the eye is divided into three layers: the fibrous tunic Functionally, the eye can be divided into structures that perceive light (components of the visual pathway) and structures that refract light (refractive media).Autonomic fibers that origi- inal fibers (VI-V3) are within the trigeminal (gasserian or. nate from the superior salivatory nuclei of the facial nerve (CN VII) accompany principal sensory nucleus, and the mesencephalic nucleus, each of which subserves a distinct trigeminal function. aunculotemporal, and...Nerve fibers from the medial aspect of each eye _. A) go to the superior colliculus only. B) pass posteriorly without crossing over at the chiasma. The first "way station" in the visual pathway from the eye, after there has been partial crossover of the fibers in the optic chiasma, is the _.

anatomy 15 sensory Flashcards | Quizlet

Eye movements are controlled by muscles innervated by cranial nerves III, IV and VI. It is not necessary to have the patient look straight up and down in order to test each of the extraocular These synapses will be replaced by synapses of fibers from the intact eye and the patient will...The oculomotor nerve originates from the oculomotor sulcus on the medial aspect of the cerebral peduncle of the midbrain and appears in the interpeduncular fossa. The postganglionic fibres from using this ganglion run via short ciliary nerves and supply the sphincter pupillae and ciliaris muscles.Each hemisphere controls the contralateral half of the face (facial region above the eyes is controlled by both contralateral cortical and ipsilateral cranial nerve function). The Dorsolateral, Orbitofrontal (inferior or ventral frontal lobe) and Medial Frontal/Cingulate gyrus (anterior portion) areas compose...The medial pectoral nerve arises from the medial cord of the brachial plexus and is composed of branches of C8 and T1. A few branches transect the pectoralis minor muscle and enter the PM to provide motor control of the sternocostal head of the muscle.

Eye and orbit - AMBOSS | Fibrous tunic (external layer)

The medial cutaneous nerve of forearm arises from the medial cord of the brachial plexus and receives fibers form the eighth cervical and first The posterior branch (ulnar branch) passes obliquely down along the medial side of the basilic vein to the posterior aspect of the forearm and descends...Third nerve (oculomotor nerve). Cranial nerve III (CN III) innervates the superior, inferior, medial • Fasciculus[2] • consists of e erent bres which pass from the third nerve nucleus through the red nucleus and the medial aspect of the cerebral Each eye will therefore perceive a horizontal line. •For example, the dorsal aspect of this level of the medulla contains the fasciculus gracilis and fasciculus Axons of the medial lemniscus initially pass ventrally in an arc (where fibers arising from the In brief, the locations of neuronal cell groups associated with cranial nerve function can be...Nerve fibers from the medial aspect of each eye _. The first "way station" in the visual pathway from the eye, after there has been partialcrossover of the fibers in the optic chiasma, is the _.Optic nerve: This thick bundle of nerve fibers transmits signals from the retina to the brain. In all, there are around 1 million thin, retinal fibers called ganglion cells that carry light information from the retina to the brain. The ganglion cells leave the eye at a point called the optic disc.

The medial cutaneous nerve of the forearm, often referred to as the medial antebrachial cutaneous nerve, is a branch of the medial twine of the brachial plexus and provides the anterior and medial aspects of the forearm as some distance distal as the wrist.

Gross anatomyOrigin

The medial cutaneous nerve of forearm arises from the medial wire of the brachial plexus and receives fibers shape the eighth cervical and first thoracic nerve roots.

Course

The medial cutaneous nerve of the forearm is a large nerve that arises from the medial wire of the brachial plexus. Initially it runs with the ulnar nerve with which it is from time to time puzzled. The nerve then pierces the deep fascia at roughly the mid-arm, along the basilic vein to go into the subcutaneous tissues of the forearm. The medial cutaneous nerve of the forearm divides into anterior and posterior (or volar and ulnar) terminal branches.

Branches and provide

The anterior department (volar banch) of the medial cutaneous nerve of the forearm is normally larger and usually passes anteriorly to the basilic vein. The nerve then descends on the anteriomedial aspect of the forearm distributing small cutaneous branches to the ulnar facet of the forearm as far as the wrist. Distally the anterior branch communicates with the palmar cutaneous department of the ulnar nerve.

The posterior branch (ulnar branch) passes obliquely down along the medial side of the basilic vein to the posterior aspect of the forearm and descends on its ulnar aspect giving off small cutaneous terminal branches alongside its course. The posterior department communicates with the medial cutaneous nerve of the arm and the posterior cutaneous nerve of the forearm, a department of the radial nerve.

Relationsinitially it runs between the axillary artery and the axillary vein in front of the ulnar nerve pierces the deep fascia of the arm alongside the basilic vein Variant anatomy

Anomalous communique between the medial cutaneous branch of forearm and the radial nerve has been reported in isolated cadaveric dissections.