mylohyoid muscle

Information about mylohyoid muscle

Muscles of the neck. Anterior view. Mylohyoid muscle in purple
Front view of neck. (Mylohyoideus labeled at right, second from top.)
Latinmusculus mylohyoideus
subject #112 393
Origin:Mylohyoid line (mandible)
Insertion:Median raphé
Artery:mylohyoid branch of inferior alveolar artery
Nerve:mylohyoid nerve, from inferior alveolar branch of mandibular nerve [V3]
Action:Raises oral cavity floor, elevates hyoid, depresses mandible
Dorlands/Elsevier m_22/12549818
The mylohyoid muscle is a muscle running from the mandible to the hyoid bone, forming the floor of the oral cavity.

Structure

The mylohyoid muscle is flat and triangular, and is situated immediately above the anterior belly of the digastric muscle. It forms, with its fellow of the opposite side, a muscular floor for the cavity of the mouth.

It arises from the whole length of the mylohyoid line of the mandible, extending from the symphysis in front to the last molar tooth behind. The posterior fibers pass medialward and slightly downward, to be inserted into the body of the hyoid bone. It thus belongs to the suprahyoid muscles.

The middle and anterior fibers are inserted into a median fibrous raphé extending from the symphysis menti to the hyoid bone, where they joint at an angle with the fibers of the opposite muscle. This median raphé is sometimes absent; the fibers of the two muscles are then continuous.

Innervation

The mylohyoid muscle, along with the anterior belly of the digastric muscle, is innervated by the mylohyoid nerve, a nerve that ultimately arises from the mandibular division of the trigeminal nerve.

Variations

It may be united to or replaced by the anterior belly of the digastric muscle; accessory slips to other hyoid muscles are frequent.

Additional images


Mandible. Inner surface. Side view.

Hyoid bone. Anterior surface. Enlarged.

Superficial dissection of the right side of the neck, showing the carotid and subclavian arteries.

The arteries of the face and scalp.

Distribution of the maxillary and mandibular nerves, and the submaxillary ganglion.

Sagittal section of nose mouth, pharynx, and larynx.


External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

 •  • [ e]
Muscles of head and neck: the neck
CERVICALplatysma - sternocleidomastoid
SUPRAHYOIDdigastric - stylohyoid - mylohyoid - geniohyoid
INFRAHYOID/STRAPsternohyoid - sternothyroid - thyrohyoid - omohyoid
VERTEBRAL — ANTERIORlongus colli - longus capitis - rectus capitis anterior - rectus capitis lateralis
LATERALscalene (anterior - medius - posterior)
Latin}}} 
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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bold refer to the diagram at right.)

In the skull (8):
  • 1-9. cranium
  • 7. mandible
''In the middle ears (6):
  • malleus
  • incus
  • stapes
In the throat (1):
  • hyoid
In the shoulder girdle (4):
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mylohyoid line, which is the origin of the mylohyoid muscle; the posterior part of this line, near the alveolar margin, gives attachment to a small part of the Constrictor pharyngis superior, and to the pterygomandibular raphé.
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mandible (from Latin mandibūla, "jawbone") or inferior maxillary bone is, together with the maxilla, the largest and strongest bone of the face . It forms the lower jaw and holds the lower teeth in place.
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bold refer to the diagram at right.)

In the skull (8):
  • 1-9. cranium
  • 7. mandible
''In the middle ears (6):
  • malleus
  • incus
  • stapes
In the throat (1):
  • hyoid
In the shoulder girdle (4):
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The term Median raphé can refer to one of two different anatomical structures:
  • The pharyngeal raphe
  • The perineal raphe, also known as the "median r. of perineum"

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Arteries are muscular blood vessels that carry blood away from the heart.[1] All arteries, with the exception of the pulmonary and umbilical arteries, carry oxygenated blood.

The circulatory system is extremely important for sustaining life.
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As the inferior alveolar artery enters the mental foramen, it gives off a mylohyoid branch which runs in the mylohyoid groove, and ramifies on the under surface of the Mylohyoideus.
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  • Accessory nerve
  • Accessory obturator nerve
  • Alderman's nerve
  • Anococcygeal nerve
  • Ansa cervicalis
  • Anterior interosseous nerve
  • Anterior superior alveolar nerve
  • Aortic plexus
  • Auerbach's plexus
  • Auriculotemporal nerve
  • Axillary nerve

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The mylohyoid nerve (or nerve to mylohyoid) is a nerve that innervates the mylohyoid muscle and the anterior belly of the digastric muscle.

Structure

The mylohyoid nerve branches from the inferior alveolar nerve (a branch of the mandibular nerve, the third part of
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The inferior alveolar nerve (sometimes called the inferior dental nerve) is a branch of the mandibular nerve, which is itself the third branch (V3) of the fifth cranial nerve, the trigeminal nerve (cranial nerve V).
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Kinesiology is the scientific study of the anatomy, physiology, and mechanics of body movement, especially in humans. [1] The word kinesiology is derived the Greek "kinesis" (motion) + the suffix -ology or -logy from the greek "logos" or "logia"(meaning a field of study).
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The human mouth (or oral cavity) is covered by an upper and lower lip.

The mouth starts digestion by physically chewing the food and breaking it down with saliva.

The average male mouth holds a volume of about 100mL.
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Elevation, in kinesiology is the anatomical term of motion for movement in a superior direction.

It is the opposite of depression.

Muscles

  • elevation of the scapula at the shoulders (e.g.

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The hyoid bone (Lingual Bone) is a bone in the human neck, and is the only bone in the skeleton not articulated to any other bone. It is supported by the muscles of the neck and in turn supports the root of the tongue.
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Depression, in kinesiology, is the anatomical term of motion for movement in an inferior direction.

It is the opposite of elevation.

This term is often applied to the shoulders (e.g. dropping them to a normal condition after shrugging them would be depression).
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mandible (from Latin mandibūla, "jawbone") or inferior maxillary bone is, together with the maxilla, the largest and strongest bone of the face . It forms the lower jaw and holds the lower teeth in place.
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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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MUSCLE (multiple sequence comparison by log-expectation) is public domain, multiple sequence alignment software for protein and nucleotide sequences.
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mandible (from Latin mandibūla, "jawbone") or inferior maxillary bone is, together with the maxilla, the largest and strongest bone of the face . It forms the lower jaw and holds the lower teeth in place.
..... Click the link for more information.
The hyoid bone (Lingual Bone) is a bone in the human neck, and is the only bone in the skeleton not articulated to any other bone. It is supported by the muscles of the neck and in turn supports the root of the tongue.
..... Click the link for more information.
The human mouth (or oral cavity) is covered by an upper and lower lip.

The mouth starts digestion by physically chewing the food and breaking it down with saliva.

The average male mouth holds a volume of about 100mL.
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The digastric muscle (named digastric as it has two bellies) is a small muscle located under the jaw.

It lies below the body of the mandible, and extends, in a curved form, from the mastoid process to the symphysis menti. It belongs to the suprahyoid muscles group.
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mouth, also known as the buccal cavity or the oral cavity, is the orifice through which an organism takes in food and water.

Location

In all mammals, the mouth is forward-facing in the face. Non-mammals have mouths in other locations (e.g.
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mandible (from Latin mandibūla, "jawbone") or inferior maxillary bone is, together with the maxilla, the largest and strongest bone of the face . It forms the lower jaw and holds the lower teeth in place.
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Molars are the rearmost and most complicated kind of tooth in most mammals. In many mammals they grind food; hence the Latin name mola, "millstone".

Human molars

Adult humans have twelve molars, in four groups of three at the back of the mouth.
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The hyoid bone (Lingual Bone) is a bone in the human neck, and is the only bone in the skeleton not articulated to any other bone. It is supported by the muscles of the neck and in turn supports the root of the tongue.
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The term suprahyoid refers to the region above (superior to) the hyoid bone in the neck. The suprahyoid muscles include digastric, stylohyoid, geniohyoid, and mylohyoid.
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A raphe has different uses:

In science

Pronounced "RAY-fee" ['ɹeɪ·fɪ]), it is most commonly used when describing diatoms, seeds, and human anatomy.
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symphysis menti or line of junction of the two pieces of which the bone is composed at an early period of life.

This ridge divides below and encloses a triangular eminence, the mental protuberance, the base of which is depressed in the center but raised on either side to
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