Dictionary » T » Tonus




(1) Tonicity of muscle.

(2) The muscle in a steady partially contracted state caused by the successive flow of nerve impulses, as in muscle tonus.


Word origin: Greek tónos (tone)

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peripheral nervous system

... reflex is a monosinaptic reflex that closes in the spine. All your skeletal muscles are in a permanent state of mild contraction called muscular tonus, which is a reflex that closes in the cerebellum. In neurodegenerative disorders, what happens is that commands don't travel smoothly from the ...

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by MrMistery
Sat Mar 21, 2009 12:01 am
Forum: Physiology
Topic: peripheral nervous system
Replies: 3
Views: 10621

questions about hypertonic hypotonic

hypo- = under hyper- = over iso- = similar tonus = tone -- tonic (adj.) Water flows from hypotonic solution to hypertonic solution, as osmosis a.k.a water diffusion, to create isotonic solutions on both side (balance).

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by DoctorStein
Mon Jul 07, 2008 2:14 am
Forum: General Discussion
Topic: questions about hypertonic hypotonic
Replies: 6
Views: 58963

the brain

The removing of the cerebellum is compatible with life, but in the first weeks after removal causes atony(lack of muscular tonus), astazia(you can not hold your balance without a large support) and asthenia(fast muscular fatigue). The functions of the cerebellum are gradually taken ...

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by MrMistery
Wed Sep 28, 2005 5:26 pm
Forum: Human Biology
Topic: the brain
Replies: 1
Views: 1969

Why can't the human baby walk after birth?

It has nothing to do with the development of the cerebellum. The cerebellum also comands muscular tonus and modulates movement and the baby can do that. Anatomy 101: the baby's nervous system is fully developed at birth. It only lacks synapses.

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by MrMistery
Thu Jul 07, 2005 5:42 pm
Forum: Human Biology
Topic: Why can't the human baby walk after birth?
Replies: 26
Views: 20291

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