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head and neck ~ anatomy > Triangles Of The Neck > Flashcards

Triangles Of The Neck Flashcards

1
Q

Boundaries for Posterior Triangles

A

In front ~ Post. Border of SCM

Behind ~ Trapezius Muscle

Apex ~ Mastoid Process

Base ~ Clavicle Bone

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2
Q

Posterior Triangles are Divided By

A

Inferior belly of omohyoid

Into Occipital

and

SupraClavicular/SubClavian Triangle

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3
Q

Posterior Belly Of Digastric Closely accompanied by ___________ Muscle

A

StyloHyoid Muscle

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4
Q

Anterior Triangles

A
  1. Sub Mental Triangle
  2. Digastric Triangle
  3. Carotid Triangle
  4. Muscular Triangle
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5
Q

Floor of Posterior Triangles Made By

A

Prevertebral Layer of deep cervical fascia

Below the DC Fascia~

Semispinalis Capitis
Splenius Capitis
Levator scapulae
Scalenus - post, medius, ante

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6
Q

Roof of Posterior Triangle Made By

A

Skin

Superficial fascia

Platysma Muscle

External Jugular Vein

DCF - Investing Layer

Cutaneous branches of cervical plexus (forms roof and content)

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7
Q

Cutaneous Branches of Cervical Plexus

A

Great auricular nerve

Lesser occipital nerve

Transverse cervical nerve

Supraclavicular nerve

(Forms roof and content of posterior triangle)

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8
Q

Most superficially located content of occipital triangle

A

Spinal Part of Accessory Nerve

Because it is present b/w the Investing layer (roof) and Prevertebral layer (floor)

Innervates SCM and Trapezius

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9
Q

Nerve from C5 Root of Brachial Plexus

A

Dorsal Scapular Nerve

Innervates ~

Rhomboid Major
Rhomboid Minor

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10
Q

Contents of Occipital Triangle

A

Spinal Part of Accessory Nerve

Cutaneous branches of cervical plexus

Proprioceptive fibres from Trapezius-C3, C4

C5 Root of brachial plexus - Dorsal Scapular Nerve

Transverse cervical artery

Occipital artery

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11
Q

Subclavian artery divided into 3 parts by

A

Scalenus Anterior

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12
Q

Contents of SupraClavicular / SubClavian Triangle

A

3rd Part of subclavian artery

SupraScapular Artery

Dorsal scapular artery

Subclavian vein

Trunk of Brachial plexus

Long Thoracic Nerve {C5, C6, C7}

SupraScapular Nerve {C5, C6}

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13
Q

Content of SubMental Triangle

A

SubMental Nodes

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14
Q

Content of Muscular Triangle

A

Infrahyoid Muscles

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15
Q

Nerve to Mylohyoid Muscle supplies

A

Mylohyoid And Anterior Belly of Digastric

All 3 are Derivatives of 1st Arch

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16
Q

Nerve to Mylohyoid arising from

A

Posterior Division Of Mandibular Nerve ~ Inferior Alveolar Nerve ~ Nerve To Mylohyoid

17
Q

Contents of Digastric Triangle

A

Superficial part of SubMandibular Gland

Facial artery and vein

Nerve to Mylohyoid

Hypoglossal Nerve (XII) is content of Both Carotid and Digastric Triangle

18
Q

Boundaries of Carotid Triangle

A

Above and Front ~
Post. Belly of Digastric
Stylohyoid Muscle

Below and Front ~
Superior Belly of Omohyoid

Behind ~
Anterior Margin of SCM

19
Q

Structures within Carotid Sheath

A

Common Carotid Artery
Internal Jugular Vein
Vagus Nerve

20
Q

CCA Bifurcates at

A

C3 - C4 (C4 > C5)

Or

Upper Border of Lamina of Thyroid Cartilage

21
Q

Carotid body situated at

A

At the level of Bifurcation of CCA

Is yellow pigmented Structure

Acts as Chemoreceptor ~ maintains chemical composition

22
Q

Fusiform dilation of ICA is called

A

Carotid Sinus

Acts as Baroreceptor ~ maintains Pressure

23
Q

Tumor in the Carotid Body leads to

A

Splaying of ICA and ECA

Which gives an appearance of Lyre ~ Lyre Sign

24
Q

1st Branch of ECA

A

Superior Thyroid Artery

25
Q

Anterior Branches of ECA

A

Superior Thyroid Artery
Lingual Artery
Facial Artery

26
Q

Posterior Branches of ECA

A

Occipital Artery

Posterior Auricular Artery

27
Q

Thinnest Branch of ECA

A

Ascending Pharyngeal Artery ~ in medial side

28
Q

Terminal Branches of ECA

A

Maxillary Artery

Superficial Temporal Artery

29
Q

Branches of ECA not present in the Carotid Triangle

A

Terminal Branches (arises at the level of neck of mandible)

Posterior Auricular Artery

30
Q

Arteries present in the Carotid Triangle

A
  1. CCA
  2. ECA
  3. ICA
  4. Superior Thyroid Artery
  5. Lingual Artery
  6. Facial Artery
  7. Occipital Artery
  8. Ascending Pharyngeal Artery

Internal Jugular Vein

31
Q

Contents of Carotid Triangle

A

5 Nerves;

Vagus Nerve
Ansa Cervicalis
Cervical Sympathetic Chain
Hypoglossal Nerve
Spinal Accessory Nerve

1 Vein;
Internal Jugular Vein

8 Arteries;

CCA, ICA, ECA
Superior Thyroid Artery
Lingual Artery 
Facial Artery
Occipital Artery
Ascending Pharyngeal Artery
32
Q

Floor Muscles of Digastric Triangle

A

Mylohyoid Muscle
Hyoglossus Muscle
Middle Constrictor Muscle

Middle Constrictor And Hyoglossus forms floor for Carotid and Digastric Triangle

33
Q

Floor Muscles of Carotid Triangle

A

Muscles arising from Thyroid Cartilage and Hyoid Bone

Thyrohyoid Muscle
Inferior Constrictor

Middle Constrictor
Hyoglossus Muscle

34
Q

Boundaries of Suboccipital Triangle

A

Above and Medially;
Posterior margin of rectus capitis

Above and Laterally;
Oblique capitis superior

Below and Laterally;
Oblique capitis inferior

35
Q

Floor of SubOccipital Triangle is formed by

A

Posterior Atlanto-Occipital Membrane

Posterior Arch of Atlas

36
Q

Contents of SubOccipital Triangle

A

3rd Part of Vertebral Artery

SubOccipital Nerve ~ Dorsal Rami of C1

head and neck ~ anatomy (16 decks)

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