A&P - Chapter 21 (Part 2) Flashcards
What are the 4 major pairs of plexuses?
- Cervical
- Brachial
- Lumbar
- Sacral and coccygeal
Where are cervical plexuses located?
Deep within the neck
What to cervical plexuses innervate? (4)
- Muscles of the neck
- Skin of the neck
- Upper shoulders
- Part of the head
Where is the brachial plexuses located?
Deep within the shoulder
What does the brachial plexuses innervate? (2)
- Lower part of the shoulder
2. Entire arm
Where is the lumbar plexuses located?
In the lower back in the psoas muscles
What does the lumbar plexuses supply? (2)
- Thigh
2. Leg
What does the sacral and coccygeal plexuses supply? (3)
- Skin of the leg
- Leg
- Foot
Sciatica
Pain affecting the back
Dermatome
A specific area of skin surface supplied by sensory fibres of a single spinal nerve
Myotome
A skeletal muscle or muscles supplied by motor fibres of a given spinal nerve
What symptom do you experience in your spinal nerves when you get older or lose a lot of weight in a short amount of time? Why?
- Numbness
2. Due to lack of support
What do cranial nerves connect to?
The brain
- mostly the brainstem
What is the function of cranial nerves?
They conduct impulses between the brain and structures in the head and neck and in the thoracic and abdominal cavities
What are the 12 cranial nerves?
- Olfactory
- Optic
- Oculomotor
- Trochlear
- Trigeminal
- Abducens
- Facial
- Vestibulocochlear
- auditory - Glossopharyngeal
- Vagus
- Accessory
- Hypoglossal
