Miotomos da Medula Espinhal

Prévia do material em texto

Myotomes of the Spinal Cord Each segmental nerve root innervates more than one muscle. For simplicity, certain muscles or muscle groups are identified as representing a single spinal nerve root. External anal sphincter tone should also be assessed by digital ex- amination. * Note that the spinal cord ends at L1 (below this is the cauda equina). The cauda equina is more resilient to injury than the spinal cord. C5 Deltoid C5 C7 C6 Extends C7 C6 Flexes C8 forearm forearm triceps biceps T1 T1 Small C8 Flexes the muscles of wrist & fingers the hand eg little finger L2 abductor Hip flexors iliopsoas L3/L4 * Knee extensors patellar reflexes L2 & quads L3 L4 L4 L5 L5 S1 S1 L5 Ankle & big toe dorsiflexors L4/L5/S1 & tibialis ant. Knee flexors ext. hallucis hamstrings longus S1 Ankle plantar flexors S2-S4 gastrocnemius, ! soleus (pudendal nerve) * External anal Note that the spinal cord ends at L1 sphincter tone (below this is the cauda equina). should also be The cauda equina is more resilient assessed by digital to injury than the spinal cord. examination. www.PicturingMedicine.com © 2014 John Kenneth Dickson