The Neck Flashcards

1
Q

What is the superior and inferior limit of the neck?

A
  • Superior: Mandible and base of skull

- Inferior: thoracic inlet

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2
Q

Anatomically, the neck is divided into anterior and posterior portions of the neck. What is it divided by?

A

The sternocleidomastoid muscle

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3
Q

What are the proximal and distal attachments of the sternocleidomastoid muscle?

A
  • Proximal attachment: mastoid process

- Distal attachment: sternum and clavicle

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4
Q

What does the sternocleidomastoid do when there is only one working?

A

Rotates head and moves slightly upwards

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5
Q

What does the sternocleidomastoid do when both of them are working?

A

Head is bought forward and down

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6
Q

What are the boundaries of the anterior triangle of the neck?

A
  1. Sternocleidomastoid muscle
  2. The midline
  3. The lower border of the mandible
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7
Q

What are the boundaries of the posterior triangle of the neck?

A
  1. Sternocleidomastoid
  2. Trapezius muscle
  3. Middle third of the clavicle
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8
Q

What can the contents of the anterior triangle of the neck be divided into?

A
  1. Muscles
  2. Skeletal elements and viscera
  3. Glands
  4. Nerves
  5. Vessels
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9
Q

What are the muscles found in the anterior triangle?

A
  • Mylohyoid
  • Anterior belly of digastric
  • Infrahyoid muscles (Sternohyoid, sternothyroid, thyrohyoid, omohyoid)
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10
Q

What are the skeletal elements of the anterior triangle of the neck?

A
  • Thyroid cartilage: largest of the laryngeal cartilages
  • Cricoid cartilage: below the thyroid cartilage, just above the trachea
  • Hyoid bone: single bone not joined into any other bone
  • Trachea
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11
Q

What are the glands found in the anterior triangle of the neck?

A
  • Thyroid gland
  • Parathyroid glands
  • Submandibular glands
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12
Q

How would you examine the thyroid gland of a patient?

A

Offer the patient a drink of water and ask them to swallow for you - feel the neck when the patient swallows and should feel if there is any swelling round the gland

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13
Q

What type of gland is the thyroid gland?

A

Endocrine

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14
Q

What is the thyroid gland enclosed by?

A

Pre-tracheal fascia (band of fibrous tissue)

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15
Q

What arteries supply the thyroid gland?

A
  • Superior (external carotid) and inferior (thyrocervical trunk) arteries
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16
Q

What is an isthmus?

A

Small bit of tissue between 2 larger bits of tissue

17
Q

What is the levator gandulae thyroidae?

A

Fibrous structure that passes from thyrohyoid muscle to the isthmus of the thyroid gland

18
Q

What is the function of the parathyroid hormone?

A

Helps increase blood calcium levels - if they are not at an appropriate level they can affect muscle function

19
Q

What are the 2 set of parathyroid glands?

A

Superior and inferior sets

20
Q

What % of the population has more than 4 parathyroid glands?

A

5% of the population

21
Q

Which set of parathyroid glands are more constant in their position?

A

The superior set

22
Q

What can happen if parathyroid glands are removed from the body?

A

Tetany - abnormal muscle contractions as there is not a regulated calcium load

23
Q

What nerves innervate the anterior triangle of the neck?

A
  • Vagus
  • Phrenic
  • Hypoglossal
24
Q

What does the phrenic nerve innervate?

A

The diaphragm

25
Q

The diaphragm used to be surgically divided as a treatment for T.B. Why is this not done now?

A

If you cut the phrenic nerve the diaphragm cannot work and the lung will die off

26
Q

What blood vessels supply the anterior triangle of the neck?

A
  • Common carotid artery

- Jugular veins

27
Q

What can the contents of the posterior triangle of the neck be divided into?

A
  1. Nerves
  2. Muscles
  3. Vessels
  4. Lymph nodes
28
Q

What nerves innervate the posterior triangle of the neck?

A
  • Accessory nerve
  • Parts of the brachial plexus (supplies all of the upper limbs)
  • Cutaneous cervical nerves (supply sensation on the skin)
29
Q

What muscles in the neck does the accessory nerve supply?

A
  • Purely motor nerve

- Supplies sternocleidomastoid and trapezius

30
Q

What is the clinical test to check that CNXI is working?

A

As the patient to look to one side and push against your hand

31
Q

What does the brachial plexus in the posterior triangle of the neck consist of?

A
  • Starts at C5 and ends at C8
  • It has:
  • Roots
  • Trunks
  • Divisions (anterior/posterior)
  • Cords
  • Terminal branches
32
Q

What do lymph nodes look like?

A

Small, oval to bean shaped structures

33
Q

What are the functions of lymph nodes?

A
  • Filter lymph

- Offer defence against the spread of infection

34
Q

Where are the superficial lymph nodes found in the posterior triangle of the neck?

A
  • Just on front of ear
  • Just over cheek
  • Some down to lower aspect and many more
35
Q

Where are the deep lymph nodes found in the posterior triangle of the neck?

A

Ones where patients tend to say their glands are up