Leg Musculature

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Biology 223 Human Anatomy and Physiology I Week
6 Lecture 1 Monday Dr. Stuart S. Sumida
Appendicular Musculature
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Innervation
Dorsal Ramus
Hypaxial
Distal Dorsal Branch
Epaxial
Distal Ventral Branch
Ventral Ramus
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Each limb receives more than 1 nerve Usually
about 6
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More Posterior branches extend more distally
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Limb Quadrants
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Dorsal Mass elevates (extends) limb
Ventral Mass depresses (flexes) limb
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Caudal Dorsal
Cranial Dorsal
Cranial Ventral
Caudal Ventral
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Cranial/Ventral (Superior/Anterior) Attaches to
pubic bone
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Caudal/Ventral Inferior/Anterior) Attaches to
Ischium
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Cranial/Dorsal Superior/Posterior) Attaches to
upper part of ilium
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Caudal/Dorsal Inferior/Posterior) Attaches to
lower part of ilium
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Cranial/Dorsal Superior/Posterior
Cranial/Ventral Superior/Anterior
Caudal/Ventral Inferior/Anterior
Caudal/Dorsal Inferior/Posterior
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Caudal view
Dorsal view
Ventral view
Lateral view
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Mammals Non- Sprawling Posture
Reptiles Sprawling Posture
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Ventral (Anterior) view
Lateral view
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The Lumbosacral Plexus
Obturator
(Peroneal)
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Superior/Posterior (Cranial/dorsal) QUADRICEPS
FEMORAL NERVE
Sartorius
Rectus Femoris
Vastus Medialis
Vastus Lateralis
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Inferior/Posterior (Caudal/dorsal) GLUTEAL GROUP
SCIATIC NERVE (PERONEAL)
Maximus
Tensor Fascia Latae
Minumus
Medius
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Inferior/Posterior (Caudal/dorsal) ANTERIOR
TIBIAL GROUP PERONEI
SCIATIC NERVE (PERONEAL)
Tibialis Anterior
Peronius Longus
Extensor Digitorum Longus
Peronius Brevis
Extensor Hallucus Longus
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Superior/Anterior (Cranial/ventral) ADDUCTORS
OBTURATOR NERVE
Gracilis
Adductor Brevis
Adductor Longus
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Inferior/Anterior (Caudal/ventral)
Adductor Magnus (adductor part)
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Inferior/Anterior (Caudal/ventral) HAMSTRINGS
SCIATIC NERVE (TIBIAL)
Semitendinosis
Semimembranosis
Biceps Femoris
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Inferior/Anterior (Caudal/ventral)
SCIATIC NERVE (TIBIAL)
Gastrocnemus
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Inferior/Anterior (Caudal/ventral)
SCIATIC NERVE (TIBIAL)
Soleus
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Inferior/Anterior (Caudal/ventral)
SCIATIC NERVE (TIBIAL)
Flexor Digitorum Longus
Flexor Hallucis Longus
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Inferior/Anterior (Caudal/ventral) LATERAL HIP
ROTATORS
SCIATIC NERVE (TIBIAL)
Quadratis Femoris
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