Nerve Supply on Bones | The University Of Western Ontario

University:
The University Of Western Ontario
Course:
ANAT 2200B | Systemic Anatomy of the Human Body
Academic year:

2022
Views:

366

Pages:

3
Author:

Kyuwon J.

Nerve supply on Bones ● Bone richly innervated ○ Especially on periosteum ○ Neural elements will travel through blood vessels ■ Pain perceptions ■ Regulation on blood flows ■ Bone remodeling ● neuro -osteogenic coupling Types of Nerve fiber of Bones ● Sensory fibers ○ Predominant functional components ○ Nociceptive fibers ■ Pain from trauma, fracture, and inflammation ■ Pressure signals form periosteums ● Autonomic fibers ○ Sympathetics ○ Vasomotor ■ Blood flow of bone and marrow regulations ■ Indirect influence of osteoblast and osteoclast activity ○ Parasympathetic fibers on negligible bones Distribution on nerve supply ● High-Yield ○ Periosteum ■ Densely innervated ■ Rich in network of pain fibers ● Severe pain and fracture ● Pain while surgical stripping ● Tenderness in periostisis ■ Most sensitive ○ Cortical Bones ■ Sparse nerve endings ■ Nerves running through… ● Haversian canals ● Volkmann canals ■ Pain is limited ○ Bone marrow ■ Moderate sensory ■ Sensitivity on… ● Increasing intra-medullary pressure ● Inflammatory processes ■ Pain in… ● Leukemia ● Osteomyelitis Epiphysis/Metaphysis = innervation through periarticulare nerve branches, association with vascular supply Nerve pathway in Bones ● Nerve entering bone alongside ○ Nutrient artery ○ Periosteal vessels ● Plexuses in marrow and cortex ● Branching into ○ Vasomotor fibers ○ Sensory endings Pain physiology ● tearing /stretching of periosteum ● Hematoma => increase in pressure ● Chemical mediators ○ Prostaglandins ○ Bradykinin This is why bone fractures are painful