INTRINSIC MUSCLES OF THE FOOT Extensor Digitorum Brevis
Layer 1
Abductor Digiti Minimi Abductor Hallucis Flexor Digitorum Brevis
Layer 2 Lumbricales
Layer 3 Adductor Hallucis Flexor Digiti Minimi Flexor Hallucis Brevis
Layer 4 Dorsal Interossei Plantar Interossei
DERMATOMES OF THE LOWER EXTREMITY
Sensory distribution for the lower extremities is laid out in dermatomal patterns associated with lumbar and sacral nerve root levels (Fig. C.1).
PERIPHERAL NERVES OF THE LOWER EXTREMITY
The peripheral nerves of the lower extremity are shown in Figures C.2 through C.5.
HIP AND KNEE MUSCULATURE ADDUCTOR BREVIS
T11 L1
L2 L3
S1 S2 S3
S4 S5
Proximal attachment: Inferior pubic ramus Distal attachment: Proximal one third of linea aspera of the femur
Innervation: Obturator nerve ADDUCTOR LONGUS
L4
Proximal attachment: Anterior surface of the pubis Distal attachment: Middle one third of the linea aspera of the femur
Innervation: Obturator nerve L5 S2 S1
ADDUCTOR MAGNUS Anterior Head
Proximal attachment: Ischial ramus Distal attachment (horizontal fi bers): Proximal linea aspera of femur
S1 S1 A B L5
Figure C.1 Dermatomes of the lower extremity. (A) Anterior view. (B) Posterior view. (From Roy S, Wolf SL, Scalzitti DA. The Rehabilitation Specialist’s Handbook, 4th ed. Philadelphia, PA: F. A. Davis Company, 2013: p. 209, with permission.)
Posterior (Extensor) Head Proximal attachment: Ischial tuberosity Distal attachment: Adductor tubercle of the femur Innervation: Sciatic nerve
Distal attachment (oblique fi bers): Entire linea aspera of the femur
