ANTERIOR TRIANGLE OF THE NECK II
This presentation is the property of its rightful owner.
Sponsored Links
1 / 19

ANTERIOR TRIANGLE OF THE NECK II PowerPoint PPT Presentation


  • 53 Views
  • Uploaded on
  • Presentation posted in: General

ANTERIOR TRIANGLE OF THE NECK II. Dr. Ahmed Fathalla Ibrahim. CAROTID TRIANGLE. BOUNDARIES: Superiorly: posterior belly of digastric Inferiorly: superior belly of omohyoid Posteriorly: sternomastoid FLOOR: Anteriorly: hyoglossus & thyrohoid muscles

Download Presentation

ANTERIOR TRIANGLE OF THE NECK II

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Anterior triangle of the neck ii

ANTERIOR TRIANGLE OF THE NECK II

Dr. Ahmed Fathalla Ibrahim


Carotid triangle

CAROTID TRIANGLE

BOUNDARIES:

  • Superiorly: posterior belly of digastric

  • Inferiorly: superior belly of omohyoid

  • Posteriorly: sternomastoid

    FLOOR:

  • Anteriorly: hyoglossus & thyrohoid muscles

  • Posteriorly: middle & inferior constrictors of pharynx

C


Carotid triangle1

CAROTID TRIANGLE


Carotid triangle2

CAROTID TRIANGLE


Carotid triangle3

CAROTID TRIANGLE


Contents of carotid triangle

CONTENTS OF CAROTID TRIANGLE

CAROTID SHEATH:

  • A condensation of deep fascia that contains:

  • Common & internal carotid arteries: (medially)

  • Internal jugular vein: (laterally)

  • Vagus nerve: between & a little posterior to arteries & vein


Contents of carotid triangle1

CONTENTS OF CAROTID TRIANGLE

  • ARTERIES:

  • Termination of common carotid: at level of disc between C3 & C4 (level of upper border of thyroid cartilage)

  • Proximal part of external carotid

  • Proximal part of internal carotid

  • Five branches of external carotid: superior thyroid, ascending pharyngeal, lingual, facial & occipital


Contents of carotid triangle2

CONTENTS OF CAROTID TRIANGLE

  • VEINS:

  • Internal jugular vein

  • Five tributaries to internal jugular veins: common facial, lingual, superior thyroid, middle thyroid, pharyngeal veins


Contents of carotid triangle3

CONTENTS OF CAROTID TRIANGLE

FIVE NERVES:

  • TWO NERVES RELATED TO CAROTID SHEATH:

  • Ansa cervicalis (anterior rami of C1,2,3): embedded in the anterior wall of sheath

  • Sympathetic trunk: embedded in the posterior wall of sheath


Contents of carotid triangle4

CONTENTS OF CAROTID TRIANGLE

  • THREE NERVES BETWEEN INTERNAL JUGULAR VEIN & INTERNAL CAROTID ARTERY:

  • Vagus (10th cranial) nerve: descends between internal jugular vein & common carotid artery

  • Spinal part of accessory (11th cranial) nerve: crosses internal jugular vein, passes deep to sternomastoid to reach posterior triangle

  • Hypoglossal (12th cranial) nerve: crosses internal & external carotid arteries, passes deep to posterior belly of digastric to reach digastric triangle


Contents of carotid triangle5

CONTENTS OF CAROTID TRIANGLE

  • DEEP CERVICAL LYMPH NODES: embedded in the anterior wall of sheath, along the internal jugular vein


Muscular triangle

MUSCULAR TRIANGLE

BOUNDARIES:

  • Anteriorly: midline of neck

  • Superiorly: superior belly of omohyoid

  • Inferiorly: sternomastoid

M


Muscular triangle1

MUSCULAR TRIANGLE

CONTENTS:

THE INFRAHYOID MUSCLES

  • Superficial layer:

  • Sternohyoid: medially

  • Omohyoid: laterally

  • Deep layer:

  • Thyrohyoid: above

  • Sternothyroid: below


Muscular triangle2

MUSCULAR TRIANGLE


Muscular triangle3

MUSCULAR TRIANGLE


Muscular triangle4

MUSCULAR TRIANGLE

FLOOR:

  • PRETRACHEAL FASCIA

  • STRUCTURES IN THE INFRAHYOID PART OF MEDIAN REGION OF FRONT OF NECK:

  • Thyrohyoid membrane

  • Thyroid cartilage

  • Cricothyroid ligament & muscle

  • Cricoid cartilage

  • Cricotracheal ligament

  • Trachea

  • Structures in front of trachea: jugular arch, inferior thyroid vein, isthmus of thyroid gland


Infrahyoid muscles superficial layer

INFRAHYOID MUSCLES(SUPERFICIAL LAYER)

Sternohyoid:

  • Origin: back of manubrium sterni

  • Insertion: hyoid bone

  • Action: depression of hyoid bone

    Omohyoid:

  • Superior belly:hyoid bone

  • Inferior belly:upper border of scapula

  • Insertion: intermediate tendon (deep to sternomastoid) attached to clavicle

  • Action: depression of hyoid bone


Infrahyoid muscles deep layer

INFRAHYOID MUSCLES(DEEP LAYER)

Thyrohyoid:

  • Origin: oblique line of thryroid cartilage

  • Insertion: hyoid bone

  • Action: depression of hyoid bone, elevation of larynx

    Sternothyroid:

  • Origin: back of manubrium sterni

  • Insertion: oblique line of thryroid cartilage

  • Action: depression of larynx


Infrahyoid muscles

INFRAHYOID MUSCLES

NERVE SUPPLY:

  • All muscles are supplied by ansa cervicalis (anterior rami of C1,2,3) EXCEPT:thyrohyoid (by anterior ramus of C1)


  • Login