Comparison between tract and nerve

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  Comparison between tract and nerve Nerve Nerve contain bundle of axons (nerve fibers) in the peripheral nervous system (PNS) that transmits signals between the central nervous system (CNS) and other parts of the body. It is the most important part of peripheral nervous system Location: Peripheral nervous system. Structure: Made of axons, connective tissue layers (endoneurium: axon is surrounded by it , perineurium: bundle of axons are surrounded by it, epineurium: whole nerve trunk is surrounded by it), and blood vessels. It gets myelination by Schwann cell   Function: Carries sensory signals to the CNS (afferent) from peripheral part of body or motor signals carry from from the CNS (efferent) to target organs like skeletal muscle, cardiac muscle, smooth muscle or glands Example: Sciatic nerve, median nerve, except optic nerve (though optic nerve is technically part of CNS in develop...
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Difference between different joints of lower limb

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 Difference between different joints of lower limb 

Ankle joint

Type: hinge variety of synovial joint

Innervation: sural, tibial, saphenous, deep fibular nerves
Muscles: tibialis anterior (dorsiflexion), gastrocnemius (plantar flexion)

Inferior (distal) tibial joint

Type : syndesmosis variety of fibrous joint

 Muscles: no muscles act on this joint

**Talocalcaneal joint or subtalar joint

Type : plane type of synovial joint
Muscles: tibialis anterior, tibialis posterior, gastrocnemius, soleus (inversion); fibularis longus, fibularis tertius, fibularis brevis (eversion)

Talocalcaneonavicular joint

Type: ball and socket type of synovial joint

Muscles: 

tibialis anterior, tibialis posterior, gastrocnemius, soleus (inversion);

fibularis longus, fibularis tertius, fibularis brevis (eversion)

Calcaneocuboid joint

Type : saddle type of synovial joint

Muscles: tibialis anterior, tibialis posterior, gastrocnemius, soleus (inversion); fibularis longus, fibularis tertius, fibularis brevis (eversion)

Naviculocuneiform joint

Type : compound joint

Muscles: fibularis longus and brevis, tibialis anterior and posterior (gliding, rotation)

Cuboideonavicular joint

Type : syndesmosis variety of fibrous joint

Muscles: fibularis longus and brevis, tibialis anterior and posterior (gliding, rotation)

Intercuneiform and cuneocuboid joints

Muscles: Muscles: fibularis longus and brevis, tibialis anterior and posterior (gliding, rotation)

Tarsometatarsal joint

Type : plane variety of synovial joint

Muscles: short and long extensors of the toe (flexion, extension);

 tibialis anterior, fibularis longus (abduction, rotation)

Intermetatarsal

Plane variety of synovial joint

Metatarsophalangeal

Type : ellipsoid variety of synovial joint
Muscles: 

flexor digitorum brevis, lumbricales, interossei (flexion);

 flexor hallucis longus and brevis (extension);

 abductor hallucis, plantar interossei (abduction);

adductor hallucis, dorsal interossei, abductor digiti minimi (adduction)

Interphalangeal joints

Type : hinge variety of synovial joint

Muscles: flexor digitorum longus and brevis (flexion);

 extensor digitorum longus and brevis (extension)

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