Muscles of the Anterior Neck, Throat & Vertebral Column

Muscles of the Anterior Neck, Throat & Vertebral Column

Muscles of the Anterior Neck, Throat & Vertebral Column Muscles of Swallowing Muscles of Swallowing The anterior portion of the neck is divided into the suprahyoid and infrahyoid muscle groups. Muscles of Swallowing The anterior portion of the neck is divided into the suprahyoid and infrahyoid muscle

groups. The suprahyoid muscles pull the hyoid bone upward and forward causing the pharynx to widen. This also leads to the epiglottis closing the trachea preventing choking. Muscles of Swallowing The anterior portion of the neck is divided into the suprahyoid and infrahyoid muscle groups. The suprahyoid muscles pull the hyoid bone upward and forward causing the pharynx to widen. This also leads to the epiglottis closing the

trachea preventing choking. The infrahyoid muscles return the hyoid bone and larynx to their original position. Muscles of Swallowing The Digastric muscle consists of two bellies united by a tendon forming a V shape. Its origins are on the lower margin of the mandible (anterior belly) and mastoid process of the temporal bone (posterior belly). They insert on the hyoid bone.

Muscles of Swallowing (Suprahyoid Group) The Digastric muscle consists of two bellies united by a tendon forming a V shape. Its origins are on the lower margin of the mandible (anterior belly) and mastoid process of the temporal bone (posterior belly). They insert on the hyoid bone. The action of the Digastric muscles are to open the mouth and assist in swallowing. Muscles of Swallowing (Suprahyoid Group)

. Median raphe Anterior Digastric belly Posterior belly Stylohyoid (cut) Thyrohyoid Thyroid cartilage of the larynx Thyroid gland

Sternothyroid (a) Mylohyoid Stylohyoid Hyoid bone Omohyoid (superior belly) Sternohyoid Sternocleidomastoid Omohyoid (inferior belly)

Muscles of Swallowing (Suprahyoid Group) The Stylohyoid lies just below the angle of the jaw and parallels the posterior Digastric muscle. Muscles of Swallowing (Suprahyoid Group) The Stylohyoid lies just below the angle of the jaw and parallels the posterior Digastric muscle. Its origin is on the styloid process and it

inserts on the hyoid bone. Muscles of Swallowing (Suprahyoid Group) The Stylohyoid lies just below the angle of the jaw and parallels the posterior Digastric muscle. Its origin is on the styloid process and it inserts on the hyoid bone.

It helps to elevate the hyoid. Muscles of Swallowing (Suprahyoid Group) The Mylohyoid is a flat triangular muscle and helps to form the floor of the mouth. Its origin is on the medial surface of the mandible and it inserts on the hyoid and median raphe. Its action is to elevate the hyoid and floor of the mouth during swallowing pushing food into the pharynx.

Median raphe Anterior Digastric belly Posterior belly Stylohyoid (cut) Thyrohyoid Thyroid cartilage of the larynx Thyroid gland Sternothyroid

(a) Mylohyoid Stylohyoid Hyoid bone Omohyoid (superior belly) Sternohyoid Sternocleidomastoid Omohyoid (inferior belly) Muscles of Swallowing

(Suprahyoid Group) The Geniohyoid is a narrow muscle that runs with the Genioglossus muscle medially. Its origin is on the inner surface of the mandible and it inserts on the hyoid. Its action is pull the hyoid superiorly and anteriorly.

Tongue Styloid process Styloglossus Hyoglossus Stylohyoid Hyoid bone Genioglossus Mandibular symphysis Geniohyoid Thyroid cartilage

Thyrohyoid (c) Muscles of Swallowing (Infrahyoid Group) The Sternohyoid muscle is the most medial muscle of the neck. Its origin is on the manubrium and clavicle. It inserts on the lower margin of the hyoid. Its action is to depress the larynx and hyoid bone if the mandible is fixed.

Median raphe Anterior Digastric belly Posterior belly Stylohyoid (cut) Thyrohyoid Thyroid cartilage of the larynx Thyroid gland Sternothyroid (a)

Mylohyoid Stylohyoid Hyoid bone Omohyoid (superior belly) Sternohyoid Sternocleidomastoid Omohyoid (inferior belly) Muscles of Swallowing (Infrahyoid Group)

The Sternothyroid muscle lies lateral and deep to the Sternohyoid. Its origin is on the manubrium of the sternum and it inserts on the thyroid cartilage. Its action is to pull the larynx and hyoid inferiorly. Muscles of Swallowing (Infrahyoid Group) Muscles of Swallowing (Infrahyoid Group) The Omothyroid muscle is strap like with

two bellies connected to a tendon. It is lateral to the Sternohyoid. Its origin is on the superior surface of the scapula and it inserts on the hyoid bone. Its action is to depress the hyoid. Muscles of Swallowing (Infrahyoid Group) Median raphe Anterior Digastric belly Posterior

belly Stylohyoid (cut) Thyrohyoid Thyroid cartilage of the larynx Thyroid gland Sternothyroid (a) Mylohyoid Stylohyoid Hyoid bone

Omohyoid (superior belly) Sternohyoid Sternocleidomastoid Omohyoid (inferior belly) Muscles of Swallowing (Infrahyoid Group) The Thyrohyoid muscle appears as a continuation of the Sternohyoid. Its origin is on the thyroid cartilage and it inserts on the hyoid.

Its action is to depress the hyoid bone or elevates the larynx is the hyoid is fixed.. Median raphe Anterior Digastric belly Posterior belly Stylohyoid (cut) Thyrohyoid Thyroid cartilage of the larynx Thyroid gland

Sternothyroid (a) Mylohyoid Stylohyoid Hyoid bone Omohyoid (superior belly) Sternohyoid Sternocleidomastoid Omohyoid (inferior belly)

Sternocleidomastoid (cut) Platysma (cut) Internal jugular vein Omohyoid Sternohyoid Sternothyroid Sternocleidomastoid Pectoralis major (c) Muscles of the Neck and Vertebral

Column The muscles which move the head originate from the axial skeleton. The major prime flexors are the Sternocleidomastoid muscles with help from the supra hyoid and infrahyoid muscle groups. The muscles of the back are deep muscles, the largest group being the erector spinae. Muscles of the Neck and Vertebral Column The Sternocleidomastoid muscle is a

prominent, two headed muscle that lies deep to the Platysma. It serves as the anatomical marker between the anterior and posterior portions of the neck. Its origins are on the sternum and clavicle and its insertion is on the mastoid. It fixes and laterally rotates the head Muscles of the Neck and Vertebral Column Spasms of the Sternocleidomastoi d muscle cause

toricollis (wryneck) also known as a stiff neck. 1st cervical vertebra Sternocleidomastoid (a) Anterior Base of occipital bone Mastoid

process Middle scalene Anterior scalene Posterior scalene Muscles of the Neck and Vertebral Column The Scalenes muscle group are located more laterally on the neck. They are three muscles that run deep to the

Sternocleidomastoid muscle. Their origin is on the transverse processes of the cervical vertebrae and the insert anterolaterally on the first two ribs. Their action is to elevate the first two ribs and flex and to rotate the neck. Muscles of the Neck and Vertebral Column Muscles of the Neck and Vertebral Column Scalenes pain develop trigger points

(TPs) that can cause pain to refer into the chest, to the medial border of the scapula, into the shoulder, down the posterior and lateral sides of the arm to the thumb and index finger. The results cause a compression or irritation to blood vessels and nerves running through them. This can cause symptoms such as paresthesia, anesthesia, coldness, claudication, and lymphedema in the 1st cervical

vertebra Sternocleidomastoid (a) Anterior Base of occipital bone Mastoid process Middle scalene Anterior scalene

Posterior scalene Muscles of the Neck and Vertebral Column The Splenius muscle is a two part, superficial muscle that extend from the upper thoracic vertebrae to the skull. It is some times called the bandage muscle because it covers the deeper muscles of the neck. It originates on the ligamentum nuchae (a strong elastic ligament on the vertebrae)

and inserts on the mastoid process and occipital bone of the skull. . Mastoid process Splenius capitis Spinous processes of the vertebrae

Splenius cervicis (b) Posterior Muscles of the Neck and Vertebral Column The Erector spinae are the prime movers for back extension. This is a complex muscle group with three divisions. They are The iliocostalis The longissimus The spinalis

Muscles of the Neck and Vertebral Column Together Erector spinae provide resistance when flexion is occurring. The process of extension occur with the hamstrings and gluteal muscles then the erector spinae. Muscles of the Neck and Vertebral Column The Iliocostalis is the most lateral group, it originates on the iliac crest and inferior

six ribs. It inserts on the angles of the rigs and transverse processes of the cervical vertebrae. Its action is to extend and laterally flex the vertebral column. Muscles of the Neck and Vertebral Column Longissimus capitis Iliocostalis cervicis Longissimus cervicis Iliocostalis

thoracis Longissimus thoracis Spinalis thoracis Iliocostalis Erector Longissimus spinae Spinalis Iliocostalis lumborum External oblique (d) Ligamentum nuchae

Semispinalis capitis Semispinalis cervicis Semispinalis thoracis Multifidus Quadratus lumborum Muscles of the Neck and Vertebral Column

The Longissimus is the intermediate group, it consists of many muscle slips from the lumber region to the skull. It originates on the transverse processes of the lumbar up through the cervical vertebrae. It inserts on the transverse processes of the thoracic and cervical vertebrae. Its action is to extend and laterally flex the vertebral column, the upper portion extends the head. Muscles of the Neck and Vertebral

Column Longissimus capitis Iliocostalis cervicis Longissimus cervicis Iliocostalis thoracis Longissimus thoracis Spinalis thoracis Iliocostalis Erector Longissimus spinae Spinalis

Iliocostalis lumborum External oblique (d) Ligamentum nuchae Semispinalis capitis Semispinalis cervicis Semispinalis thoracis

Multifidus Quadratus lumborum Muscles of the Neck and Vertebral Column The Spinalis group is the medial group. It originates on the spinous processes of the lumbar thoracic vertebrae. It inserts on the spinous processes of the thoracic and cervical vertebrae. Its action is to extend the vertebral column.

Muscles of the Neck and Vertebral Column Longissimus capitis Iliocostalis cervicis Longissimus cervicis Iliocostalis thoracis Longissimus thoracis Spinalis thoracis Iliocostalis

Erector Longissimus spinae Spinalis Iliocostalis lumborum External oblique (d) Ligamentum nuchae Semispinalis capitis Semispinalis cervicis

Semispinalis thoracis Multifidus Quadratus lumborum Muscles of the Neck and Vertebral Column The Semispinalis group extends from the thoracic region to the head. It originates on the transverse processes of the thoracic vertebrae. It inserts on the

occipital bone of the skull and on the spinous processes of the cervical vertebrae.. There are two groups the thoracis and the capitis group. Its action is to extend the vertebral column and rotate the head to the opposite side.. Muscles of the Neck and Vertebral Column Longissimus capitis Iliocostalis cervicis

Longissimus cervicis Iliocostalis thoracis Longissimus thoracis Spinalis thoracis Iliocostalis Erector Longissimus spinae Spinalis Iliocostalis lumborum External oblique (d)

Ligamentum nuchae Semispinalis capitis Semispinalis cervicis Semispinalis thoracis Multifidus Quadratus lumborum

Muscles of the Neck and Vertebral Column The Quadratus lumborum forms the posterior part of the abdominal wall. It originates on the iliac crest. It inserts on the transverse processes of the lumbar vertebrae up to the 12th rib. Its action is to flex the vertebral column laterally, assists in maintaining an upright posture and used in forced respiration.. Muscles of the Neck and Vertebral

Column Longissimus capitis Iliocostalis cervicis Longissimus cervicis Iliocostalis thoracis Longissimus thoracis Spinalis thoracis Iliocostalis Erector Longissimus spinae Spinalis

Iliocostalis lumborum External oblique (d) Ligamentum nuchae Semispinalis capitis Semispinalis cervicis Semispinalis thoracis

Multifidus Quadratus lumborum Muscles of the Neck and Vertebral Column Stretching The Quadratus Lumborum To Relieve Lower Back Stiffness

Recently Viewed Presentations

  • www.armystudyguide.com

    www.armystudyguide.com

    16 August 2004 OPERATIONS SECURITY 31 December 2003 VGT 1 OPERATIONS SECURITY RE:AR 530-1, CH 1 Is the process of analyzing friendly actions pursuant to military operations and other activities.
  • The angiosperms Greek: angeion case; sperma seed By

    The angiosperms Greek: angeion case; sperma seed By

    Sieve Tube Members (STM) Sieve plate Cucurbita phloem Companion Cells (CC) (cucumber) STMs and CCs develop from the same progenitor cell. STMs unite vertically to form a Sieve Tube. Stems as diverse as slender vines, fat cacti, or as modified...
  • Computing Basics - Furman

    Computing Basics - Furman

    Computing Basics how computers process information how hardware is organized for instruction-execution how software directs processing the role of the operating system how the OS manages files, user interface common features of application software Computer System a computer system is...
  • Anglo-Saxon Kingdoms - WordPress.com

    Anglo-Saxon Kingdoms - WordPress.com

    Northumbria, Mercia, Essex, East Anglia, Wessex, Kent and Sussex. We are the Anglo-Saxons!! We are the only Britains left! To complete the map and the Anglo-Saxon kingdoms. Can you label the 7 kingdoms correctly? Yellow Table to fill in the...
  • Chapter 9 The Confederation and the Constitution

    Chapter 9 The Confederation and the Constitution

    THE CONFEDERATION AND THE CONSTITUTION AP AMERICAN HISTORY ... Republican motherhood and civic virtue- (pg. 159) CONSTITUTION MAKING IN THE STATES 1776- Continental Congress called on the colonies to draft individual STATE constitutions. Contracts that defined the powers of government,...
  • Matlab for Engineers Alistair Johnson 5th October 2011

    Matlab for Engineers Alistair Johnson 5th October 2011

    Don't use functions which parse variables as strings Use feval because MATLAB doesn't work well with function handles in parfor loops * Loop Serves as a loop index for arrays Sliced An array whose segments are operated on by different...
  • Chromosomal inheritance Chapter 13 Genes and Development Fig.

    Chromosomal inheritance Chapter 13 Genes and Development Fig.

    Second gene causes patchy distribution of pigment: white fur = no pigment, orange or black fur = pigment. X chromosome. allele for. black fur. Inactivated X. ... HPRT-related gout. Charcot-Marie-Tooth neuropathy. Choroideremia. Cleft palate, X-linked.
  • Approach to Anatomy

    Approach to Anatomy

    Anatomy Review Session Summer 2009