What does great auricular nerve innervate?
The great auricular nerve (GAN) is a superficial branch of the cervical plexus that provides sensory innervation to the skin overlying the parotid gland, external ear, and posterior auricular region. This nerve usually is not seen on routine imaging studies of the head and neck.
What does the posterior auricular nerve innervate?
The posterior auricular nerve (PAN) is the first extracranial branch of the facial nerve trunk. It innervates the posterior belly of the occipitofrontalis and the auricular muscles and contributes cutaneous sensation from the skin covering the mastoid process and parts of the auricle.
What is the sympathetic innervation of the bladder?
The sympathetic innervation of the bladder originates in the lower thoracic and upper lumbar spinal cord segments (T10-L2), the preganglionic axons running to sympathetic neurons in the inferior mesenteric ganglion and the ganglia of the pelvic plexus.
What level of the spine controls the bladder?
The sacral micturition center is located at sacral spinal cord level two to four (S2 to S4). Primarily a reflex center, it relays efferent parasympathetic impulses to the bladder to affect bladder contraction while afferent impulses to the sacral micturition center provide feedback regarding bladder fullness.
What are the 2 cranial nerves that communicate with great auricular nerve?
Branches and supply
- a small lateral branch of the posterior branch pierces the auricle to supply the lobule and concha.
- the posterior branch of the greater auricular nerve communicates with the lesser occipital nerve, auricular branch of the facial nerve and posterior auricular branch of the facial nerve.
How do you know if you have a great auricular nerve?
The great auricular nerve (GAN) is shown deep to the SMAS flap and immediately superficial to the belly of the SCM. Lateral border of the superficial musculoaponeurotic system (SMAS)–platysma flap just medial to the anterior border of the sternocleidomastoid (SCM).
Is posterior auricular nerve motor or sensory?
The first extracranial branch to arise is the posterior auricular nerve, providing motor innervation to the some of the extraarticular muscles.
Which nerve runs behind the ear?
Occipital Neuralgia is a condition in which the occipital nerves, the nerves that run through the scalp, are injured or inflamed. This causes headaches that feel like severe piercing, throbbing or shock-like pain in the upper neck, back of the head or behind the ears.
Is the bladder sympathetic or parasympathetic?
The sympathetic nervous system regulates the process of urine storage in the bladder. In contrast, the parasympathetic nervous system controls bladder contractions and the passage of urine.
Is salivation sympathetic or parasympathetic?
The secretion of saliva (salivation) is mediated by parasympathetic stimulation; acetylcholine is the active neurotransmitter and binds to muscarinic receptors in the glands, leading to increased salivation.