Nervous system

Nervous system

The organ system which, along with the endocrine system, correlates the adjustments and reactions of the organism to its internal and external enviroment.

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Nervous system

The esophageal plexus is formed by fibres from two sources: branches of the vagus nerve and visceral branches of the sympathetic trunk. The esophageal plexus and the cardiac plexus contain the same ...

Geniculate ganglion

Anatomy; Nervous system

An L-shaped collection of fibres and sensory neurons of the facial nerve located in the facial canal of the head. It receives fibres from the motor, sensory, and parasympathetic components of the ...

Facial nerve

Anatomy; Nervous system

The facial nerve is the seventh (VII) of twelve paired cranial nerves. It emerges from the brainstem between the pons and the medulla, and controls the muscles of facial expression, and functions in ...

Ethmoidal nerves

Anatomy; Nervous system

The ethmoidal nerves, which arise from the nasociliary nerve, supply the ethmoidal cells; the posterior branch leaves the orbital cavity through the posterior ethmoidal foramen and gives some ...

External nasal nerve

Anatomy; Nervous system

The external nasal branches (or external nasal nerve) are terminal branches of the anterior ethmoidal nerves (from the ophthalmic division of the trigeminal nerve, CN V), and provide sensory ...

External laryngeal nerve

Anatomy; Nervous system

The external laryngeal nerve is the smaller, external branch (ramus externus) of the superior laryngeal nerve. It descends on the larynx, beneath the sternothyroid muscle, to supply the cricothyroid ...

Gastric plexuses

Anatomy; Nervous system

The superior gastric plexus (gastric or coronary plexus) accompanies the left gastric artery along the lesser curvature of the stomach, and joins with branches from the left vagus.