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Anterior Triangle of the Neck, Hyoid m., deep m. of neck
Anterior Triangle of the Neck, Hyoid m., deep m. of neck
20
Anatomy
Graduate
07/26/2011

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Cards

Term

Boundaries: (3)

 

Definition

Boundaries:

anterior median line of the neck

inferior border of the mandible

anterior border of the sternocleidomastoid muscle

Term

submandibular triangle

between _____ and _____

nearly filled by the _____ gland

_____ nerve enters this triangle to get to tongue

Definition

 

submandibular triangle

between inferior border of mandible and the anterior and posterior bellies of the digastric muscle

nearly filled by the submandibular gland

hypoglossal nerve (XII) enters this triangle to get to tongue

 

Term

carotid triangle

Boundaries: _____, _____, and _____

contains _____ artery

_____ vein

_____ nerve

Definition

 

carotid triangle

superior belly of omohyoid, posterior belly of digastric, and ant. border of sternocleidomastoid

contains common carotid artery

internal jugular vein

vagus nerve

 

Term

muscular triangle

Boundaries: _____, _____, and _____

contains the _____ muscles

Definition

muscular triangle

superior belly of omohyoid, anterior border of the sternocleidomastoid, and midline of the neck

contains the four infrahyoid muscles

Term

submental triangle

unpaired triangle

bounded inferiorly by _____, and laterally by the _____

floor is formed by _____

contains some lymph nodes

Definition

 

submental triangle

unpaired triangle

bounded inferiorly by hyoid bone, and laterally by the right and left anterior bellies of the digastric muscle

floor is formed by the two mylohyoid muscles

contains some lymph nodes

 

Term

The hyoid bone is held in place and moved by a number of muscles called _____ and _____ muscles.

Definition

The hyoid bone is held in place and moved by a number of muscles called infrahyoid and suprahyoid muscles.

Term
Suprahyoid: connect hyoid bone to skull (3)
Definition

mylohyoid

geniohyoid

digastric

Term

MYLOHYOID

 

Definition

Mylohyoid

Origin:mylohyoid line on mandible

Insertion:body of hyoid bone

Innervation:mylohyoid nerve from trigeminal nerve (V)

Function:elevates the hyoid, floor of mouth, and tongue

Term

GENIOHYOID


 

Definition

 

GENIOHYOID

Origin:mental spine of mandible

Insertion:body of hyoid bone

Innervation:branch of C1

Function:pulls hyoid anterosuperiorly

 

Term

DIGASTRIC

Definition

 

DIGASTRIC

Origin:

anterior belly - digastric fossa on mandible

posterior belly - mastoid process

Insertion:two bellies are joined by an intermediate tendon which is connected to the hyoid thru a sling of fibrous connective tissue

Innervation:

anterior belly - trigeminal nerve (V)

posterior belly - facial nerve (VII)

Function:raise hyoid bone during swallowing


 

Term
Infrahyoid Muscles: anchor the hyoid bone (4)
Definition

sternohyoid

sternothyroid

thyrohyoid

omohyoid

Term

STERNOHYOID

Definition

STERNOHYOID

Origin:manubrium sterni and medial end of clavicle

Insertion:body of hyoid bone

Innervation:C1-3

Function:depress hyoid bone after elevation during swallowing

Term

STERNOTHYROID

Definition

STERNOTHYROID

Origin:posterior surface of manubrium sterni

Insertion:thyroid cartilage

Innervation:C1-3

Function:depress hyoid bone

Term

THYROHYOID

Definition

THYROHYOID

Origin:thyroid cartilage

Insertion:body and greater horn of hyoid

Innervation:C1

Function:depress hyoid bone

Term
Omohyoid
Definition

The Omohyoid Muscle has two bellies:

  1. Origin:
    1. inferior belly -upper border of scapula ending in a tendon under stern mastoid muscle
    2. superior belly -extends upward from this tendon
  2. Insertion:hyoid bone
  3. Innervation:C1-3
Term
Deep muscles of the neck (4)
Definition

longus colli

longus capitis

rectus capitis anterior

rectus capitis lateralis

Term
Longus Colli
Definition

Longus colli

    1. Origin: bodies of C5 - T3
    2. Insertion: bodies of C2 - C4
    3. Function: bilaterally - flexes cervical vertebrae, unilaterally - rotation and lateral flexion
    4. Innervation: ventral rami C2 - C8
Term
Longus Capitis
Definition

Longus capitis

    1. Origin: anterior tubercles of transverse processes of C3 - C6
    2. Innervation: inferior surface of the basilar portion of the occipital bone
    3. Function: bilaterally - flex cervical vertebrae and head, unilaterally - rotate and flex cervical vertebrae and head to the same side
    4. Innervation: C1 - C4
Term

 Rectus capitis anterior

Definition

 Rectus capitis anterior

    1. Origin: anterior surface of lateral mass of the atlas
    2. Innervation: inferior surface of occipital bone anterior to foramen magnum
    3. Function: aids in head flexion at the neck
    4. Innervation: C1, C2
Term
Rectus Capitis Lateralis
Definition

Rectus capitis lateralis

    1. Origin: superior surface of the transverse processes of the atlas
    2. Innervation: inferior surface of jugular process, occipital bone
    3. Function: aids in lateral flexion of head on neck
    4. Innervation: C1, C2
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