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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 True or Anatomical conjugate, Obstetric conjugate, Diagonal conjugate, external conjugate, median conjugate and straight conjugate

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Difference between True or Anatomical conjugate, Obstetric conjugate, Diagonal conjugate, external conjugate, median conjugate and straight conjugate These pelvic conjugates are important pelvic measurements used in obstetrics to assess the adequacy of the birth canal before vaginal delivery. They are mainly measured in the anteroposterior (AP) diameter of the pelvis. 1. True (Anatomical) Conjugate: The distance between the sacral promontory and the superior border of the pubic symphysis which represents the actual anteroposterior diameter of the pelvic inlet.   Normal Value : ~ 11 cm .   Cannot be measured directly in a living patient (due to the bladder). 2. Obstetric Conjugate (Most Clinically Important) The shortest distance between the sacral promontory and the posterior surface of the pubic symphysis and is the narrowest fixed distance through which the baby’s head must pass.   Normal Value : ~ 10 cm or more (minimum 10 cm needed for vaginal delivery...
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Difference between antero-posterior, transverse and oblique diameter of female pelvis

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Difference between antero-posterior, transverse and oblique diameter of female pelvis   Antero-posterior diameter Transverse diameter: Oblique diameter: Pelvic inlet 11 cm 13 12 Pelvic cavity 12 12 12 Pelvic outlet 13 11 12  
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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 ...
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Difference between Intermetatarsal Interphalangeal joints and Metatarsophalangeal

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 Difference between Intermetatarsal Interphalangeal joints and Metatarsophalangeal 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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