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Anatomy > Thoracic Nerves > Flashcards

Thoracic Nerves Flashcards

1
Q

The Intercostal Nerves arise from which spinal cord levels?

A

T1-T11 (T12 is subcostal)

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2
Q

The twelfth thoracic nerve is called?

A

Subcostal Nerve

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3
Q

The intercostal nerves arise from?

A

Thoracic Ventral Rami

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4
Q

The Thoracic Ventral Rami innervate?

A

The Intercostal Nerves

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5
Q

The Intercostal Nerves innervate?

A

Skin and muscles of thoracic and abdominal wall

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6
Q

The Intercostal Nerves terminate?

A

Thoracic and abdominal wall

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7
Q

Which intercostal nerves run inferiorly to the abdominal wall?

A

T6-T11 nerves (and T12 subcostal nerve) continue inferiorly to the abdominal wall.

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8
Q

Which intercostal nerves connect to the sympathetic chain? What is their function?

A

T6-T11 nerves (and T12 subcostal nerve)
Allows passage of sympathetic efferent neurons to glands in skin.

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9
Q

the Phrenic Nerve arises from what spinal cord levels?

A

C3-C5

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10
Q

What is the source of the Phrenic Nerves?

A

Cervical plexus (ventral rami of cervical spinal nerves)

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11
Q

What is the destination of the Phrenic Nerve?

A

Diaphragm

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12
Q

What does the Phrenic Nerve innervate?

A

Parietal pleura along mediastinum and diaphragm, fibrous/parietal pericardial sac, diaphragm

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13
Q

The phrenic nerve can be seen traveling?

A

Courses anterior to hilum of lung along fibrous pericardium

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14
Q

The source of the vagus nerve?

A

Medulla of brainstem

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15
Q

The vagus nerve terminates?

A

Neck, thorax, abdomen

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16
Q

The vagus nerve innervates?

A

Viscera of neck, thorax, abdomen. Terminates at junction between midgut and hindgut (around splenic flexure).

17
Q

What fibers run within the vagus nerve?

A
  1. Parasympathetic efferent (motor) fibers.
  2. Afferent (sensory) visceral fibers that play a role in unconscious reflexive control of viscera. Feelings of “unwellness” are detected by these sensory fibers.
18
Q

The Recurrent laryngeal branches arise from which nerve?

A

Vagus Nerve

19
Q

Recurrent laryngeal branches of vagus nerve
terminate?

A

Larynx

20
Q

Recurrent laryngeal branches of vagus nerve innervate?

A

Muscles of the larynx, the lining of the larynx

21
Q

the Left branch of the Recurrent laryngeal nerves travels?

A

passes under aortic arch

22
Q

the Right branch of the Recurrent laryngeal nerves travels

A

right branch passes under right subclavian artery

23
Q

The thoracic sympathetic chain arises from which spinal cord levels?

A

T1-T12

24
Q

What is the source of the thoracic sympathetic chain?

A

Thoracic Spinal Nerves

25
Q

The thoracic sympathetic chain terminates/are destined for?

A

Peripheral sympathetic fibers that follow peripheral nerves to glands and vasculature of periphery (e.g. arteries to limb muscles, sweat glands), splanchnic fibers to viscera

26
Q

Thoracic Sympathetic Chain innervates?

A

Glands and viscera of head, neck, thorax, abdomen

27
Q

Greater thoracic splanchnic nerves arise from which spinal cord levels?

A

T5-T9

28
Q

Greater thoracic splanchnic nerves terminate/are destined for?

A

Celiac ganglion and superior mesenteric ganglion

29
Q

Greater thoracic splanchnic nerves innervate?

A

Pre-aortic ganglia which have fibers linking to abdominal viscera (foregut, midgut)

30
Q

How do the greater thoracic splanchnic nerves travel?

A

Fibers project inferomedially to pass behind diaphragm to get to gut viscera

31
Q

What is the source of the greater thoracic splanchnic nerves?

A

Thoracic sympathetic chain

Anatomy (25 decks)

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