Question

what will a person SENSE that led to do pullups? show by diagram the pathway

when some body do pull ups which sense of the brain lid to do it , so how information go to the brain ? what is the pathway?

Answer 1

PULL UP- WHAT HAPPENS IN YOUR BRAIN

A pullup is a voluntary action of the body where the brain asks your muscles to do a controlled motor activity which also has an anti-gravity component . There are multiple portions that need to be understood for this mechanism.

1. The pathway of the brain controlling all voluntary motor actions of the body- the motor pathways or the corticosinal and corticobulbar tracts.

The movement is planned in the cortex, basal ganglia and the neocerebellum. From the basal ganglia and the neocerebellum, the message is sent to the motor cortex and the premotor cortex (parts of the brain responsible for the motor activity).The motor cortex then sends information to the spinal cord and thus the muscles via the corticospinal tract as shown below. This information goes to the respective muscles which leads to contraction of these muscles.

the muscles involved in the pull ups are :1. brachialis 2. biceps brachi 3. brachioradialis 4. posterior deltoid 5.trapezius 6.lattismus dorsi 7. ters major and minor 8.infraspinatus.

As these muscles receive the signal from the pathway, they contract simultaneously and help in lifting the weight of the body against the gravity. There is feedback information of the input via the sensory pathway. Also at play here is the spinocerebellum which sends information to the brain stem via the rubrospinal tract and controls co-ordination.

There are a variety of other patways that control the extent of the movement, maintain body balance, etc. which are at work . But the basic pathway which causes the movement is the corticospinal tract.