Spaces

Question 1

What is the intercostal spaces

Answer 1

space between adjoining ribs

Question 2

Contents of intercostal spaces

Answer 2

neurovascular bundle
○ Intercostal arteries & veins
○ Intercostal nerve
These lie in the costal groove along the inferior margin of the superior rib and pass in the plane between the inner two layers of muscles.

Muscles: 3 layers
○ External Intercostal
○ Internal Intercostal
○ Innermost intercostal
External intercostal and internal (and innermost) intercostals muscle fibres run in perpendicular directions - helps with their respiratory function to change internal diameters of thorax to affect intrathoracic pressure for respiration

Question 3

What is the boundaries of the anterior triangle of the neck

Answer 3

Posterior border = anterior aspect of sternocleidomastoid
Superior border = lower border of mandible
Medial border = anterior midline of neck

Question 4

Contents of anterior triangle of the neck

Answer 4

Vessels = internal carotid arteries
Nerves = cranial and cervical nerves
Muscles = suprahyoid and infrahyoid

Question 5

Boundaries of posterior triangle of the neck

Answer 5

Anterior border = posterior aspect of sternocleidomastoid
Inferior border = middle 1/3 clavicle
Posterior border = trapezius

Question 6

Contents of posterior triangle of the neck

Answer 6

Vessels = subclavian artery and jugular vein
Nerves = spinal accessory nerve XI, cervical and brachial plexus
Muscles = scaleni, levator scapulae, splenius capitis