What are the four parts of the visceral motor nucleus in the brainstem?

Arrangement of cranial nerve nuclei in the brainstem.

Somatic motor column: oculomotor nerve, trochlear nerve, abduction nerve, hypoglossal nerve, special visceral motor column: trigeminal nerve motor nucleus, facial nerve, suspicious nucleus, general visceral motor column:

Oculomotor accessory nucleus Superior salivary nucleus Vagus dorsal nucleus visceral sensory column : nucleus solitary tract.

General somatosensory column: trigeminal pontine nucleus trigeminal spinal tract nucleus.

Special somatosensory column: vestibular nucleus Cochlear nucleus.

Answer] :d Analysis: General visceral beam motor nucleus oculomotor nerve accessory nucleus:

Pupillary dilator ciliary muscle. Epicrine salivary nucleus: Fibers are added to the facial nerve to innervate the lacrimal glands, sublingual glands, submandibular glands, and oral and nasal glands.

Hypocrine salivary nucleus: fibers added to the glossopharyngeal nerve innervate parotid gland secretion through the auricular ganglia. Vagus nerve dorsal feast nucleus:

Rubber fibers pass through the vagus nerve and exchange neurons within the organ and in the paraganglia—postganglionic fibers manage the movement and secretion of thoracic and abdominal visceral smooth muscles, myocardium, and glands. Master the knowledge of "conduction pathways of visceral nerves and nervous system".

Name and function: The oculomotor nucleus gives out the oculomotor nerves innervating the superior rectus, medial rectus, inferior rectus, inferior oblique muscle, and levator palpebrae superioris muscle. 2. The nucleus of the sliding nerve sends out the trochlear nerve innervates the superior oblique muscle.

3. The motor nucleus of the trigeminal nerve is added to innervate the masticatory muscles. 4. The facial nerve nucleus joins the facial nerve to innervate the facial muscles. 5 abducens nuclei give out the nerves innervating the lateral rectus muscle.

6. The suspicious nucleus is added to the glossopharyngeal nerve, vagus mind feast meridian and accessory nerve innervation of the pharyngeal muscles. 7. The accessory nucleus gives from accessory innervation of the sternocleidomastoid muscle and trapezius muscle. 8. The hypoglossal nerve nucleus gives out the hypoglossal nerve and innervates the inner and outer muscles of the tongue.

The cranial nerve nucleus is divided into motor nuclei and sensory nuclei, which in turn are divided into somatic motor nuclei and visceral motor nuclei, which correspond to the anterior and lateral columns of the gray matter of the spinal cord, respectively. The sensory nucleus corresponds to the posterior column of the gray matter of the spinal cord and is divided into somatosensory nuclei and visceral sensory nuclei. All four nuclei are located in the dorsal part of the brainstem, with the somatic motor nucleus being the innermost nucleus and the visceral motor nucleus, visceral sensory nucleus, and somatosensory nucleus outward.

This is due to the fact that the brainstem ** tube is open as the fourth ventricle, and the gray matter roughly equivalent to the two halves of the spinal cord is rotated 90 degrees from the anterior column, so the arrangement of motor and sensory nuclei changes from the ventral dorsal direction to the medial and lateral direction. [Illustrated].

The somatic motor nucleus is mainly composed of the cell bodies of somatic motor neurons, whose axons constitute somatic motor fibers in cranial nerves that distribute to the skeletal muscles of the head and neck and manage their voluntary movements. The main one: in the midbrain, there is an oculomotor nucleus of oculomotor nerve innervating most of the extraocular muscles.

There is a motor nucleus of the trigeminal nerve in the pons, and the motor nucleus of trigemina1 nerve innervates the masticatory muscles; The nucleus of facial nerve innervates the facial muscle. nucleus of ambiguus innervates the pharyngeal muscles in the medulla; The hypoglossal nerve nucleus of the hypoglossal nerve innervates the lingual muscles.

Visceral motor nuclei The visceral motor nuclei of the brainstem belong to the parasympathetic nucleus, and their axons constitute the visceral motor parasympathetic fibers of the cranial nerves, innervating the smooth muscle, myocardium, and glands. Within the medulla is the dorsal nucleus of the vagus nerve, which innervates the smooth muscles or cardiac muscles and glands of the neck, thoracic cavity, and most of the abdominal organs.

The somatosensory nucleus receives somatosensory fibers in the cranial nerves. The important ones are the pontine nucleus of trigeminal nerve, which is located in the pons, which mainly receives tactile impulses from the face** and mucous membranes of the mouth and nose; There is also the spinal nucleus of trigeminal nerve, which is a continuation of the pontine nucleus of the trigeminal nerve, which runs down the entire length of the medulla oblongata, and mainly receives pain and temperature sensation from the facial ** and oral mucosa.

The visceral sensory nucleus is the nucleus of solitary tract in the medulla oblongata, which receives visceral sensory fibers in cranial nerves. Sensory fibers from the pharynx, larynx, thorax and abdominal organs all terminate in the nucleus of the solitary tract, and the taste fibers terminate at the upper end of the nucleus of the nucleus of the solitary tract.

a.The thalamus, midbrain, and pons.

b.Diencephalic, midbrain, and pons.

c.Diencephalic, midbrain, and medulla oblongata.

d.Midbrain, pons, and medulla.

e.The thalamus is filial to the brain, pons, and medulla oblongata.

Correct Answer: Limb D

Answer]: a, b, d

The brainstem is located in the cranial cavity and is connected to the spinal cord, including three parts: the medulla oblongata, the pontine encepontal, and the midbrain. It is the oldest part of the brain that is burned and is the main organ of life-sustaining bedrock starvation activities (breathing and heartbeat).