Presentation on theme: "Khaled Na3im Dermatomal Supply of The Lower Limb Khaled Na3im."— Presentation transcript:
Khaled Na3im Dermatomal Supply of The Lower Limb Khaled Na3im
Introduction Definition of dermatome Dermatome chart Lower limb dermatomes Dermatomes test Purpose of dermatomes test References
Skin (sensation) is innervated by a single nerve roots called the dermatomes Nerve Roots branch out off the spinal cord (31) The nerve roots branch out to form a plexus which is a network of intersecting nerves which travel to different parts of the body, they are both motor and sensory
Dermatomes Dermatome is a skin area. Dermatomal supply is the segmental sensory supply of the skin. The specific areas on the skin that represent sensory innervations from a specific root innervations from a specific root Level.
The word dermatome refers to a correspondence between the skin and the nervous system. Sensory dermatome maps-charts- used to help localize the level of neurologic deficit.
L5 L3 L4 L2 L1 S1 S2
Spinal Nerves Posterior View
(L1) hip and groin- suprapubic region-
(L2) Anterior superior thigh, medial thigh above knee
(L3) Back, anterior thigh and medial knee
(L4) Lateral thigh/knee, anterior medial lower leg to medial aspect of big toe
(L5) Lateral knee and lateral lower leg and top of foot
(S1) Buttocks, posterior lateral thigh and lateral plantar surface of foot
(S2) Buttocks, posterior medial thigh and medial plantar surface of foot
Test for abnormalities in sensitivity by using: a paper clip a pinwheel finger nail
Purpose of dermatome test To evaluation nerve root damage. Test for abnormalities in sensitivity.
All tests should be compared bilaterally. Nerves and nerve roots are typically injured by compression or stretching forces. When a nerve root is damaged a deficit may occur in the corresponding limb. The athlete should close his/her eyes and give the therapist feedback with regards to various stimuli. Note !
Lower dermatomes vid.
Dermatome comarision vid.
Clemente, C. 1997 Anatomy: A Regional Atlas of the Human Body, 4th edition. Lippincogtt Williams & Wilkins. Rinabesm C,H, 1972. Cunningham’s Textbook of Anatomy, 11th edition. Oxford University Press. Rosse, C & Gaddum-Rosse, P. 1997. Hollinshead’s Textbook of Anatomy 5th edition. Lippincott-Raven Schuenke, M et al, 2006 Thieme Atlas of Anatomy: Musculoskeletal System. Thieme. Slaby, F., et al. 1994. Gross Anatomy in the Practice of Medicine. Lea & Febiger.